Merge branch 'master' into numbersAreHard

Conflicts:
	src/compiler/checker.ts
	tests/baselines/reference/numericIndexerConstrainsPropertyDeclarations.errors.txt
	tests/baselines/reference/numericIndexerConstrainsPropertyDeclarations2.errors.txt

Author: DanielRosenwasser

CONTRIBUTING.md

@@ -9,7 +9,7 @@ Design changes will not be accepted at this time. If you have a design change pr
 ## Legal
 You will need to complete a Contributor License Agreement (CLA). Briefly, this agreement testifies that you are granting us permission to use the submitted change according to the terms of the project's license, and that the work being submitted is under appropriate copyright.
 
-Please submit a Contributor License Agreement (CLA) before submitting a pull request. Download the agreement ([Microsoft Contribution License Agreement.docx](https://www.codeplex.com/Download?ProjectName=typescript&DownloadId=822190)), sign, scan, and email it back to <[email protected]>. Be sure to include your github user name along with the agreement. Once we have received the signed CLA, we'll review the request. Please note that we're currently only accepting pull requests of bug fixes rather than new features.
+Please submit a Contributor License Agreement (CLA) before submitting a pull request. Download the agreement ([Microsoft Contribution License Agreement.docx](https://www.codeplex.com/Download?ProjectName=typescript&DownloadId=822190) or [Microsoft Contribution License Agreement.pdf](https://www.codeplex.com/Download?ProjectName=typescript&DownloadId=921298)), sign, scan, and email it back to <[email protected]>. Be sure to include your github user name along with the agreement. Once we have received the signed CLA, we'll review the request. Please note that we're currently only accepting pull requests of bug fixes rather than new features.
 
 ## Housekeeping
 Your pull request should: 

README.md

@@ -1,3 +1,7 @@
+[![Build Status](https://travis-ci.org/Microsoft/TypeScript.svg?branch=master)](https://travis-ci.org/Microsoft/TypeScript)
+[![Issue Stats](http://issuestats.com/github/Microsoft/TypeScript/badge/pr)](http://issuestats.com/github/microsoft/typescript)
+[![Issue Stats](http://issuestats.com/github/Microsoft/TypeScript/badge/issue)](http://issuestats.com/github/microsoft/typescript)
+
 # TypeScript
 
 [TypeScript](http://www.typescriptlang.org/) is a language for application-scale JavaScript. TypeScript adds optional types, classes, and modules to JavaScript. TypeScript supports tools for large-scale JavaScript applications for any browser, for any host, on any OS. TypeScript compiles to readable, standards-based JavaScript. Try it out at the [playground](http://www.typescriptlang.org/Playground), and stay up to date via [our blog](http://blogs.msdn.com/typescript) and [twitter account](https://twitter.com/typescriptlang).

doc/TypeScript Language Specification (Change Markup).docx

@@ -82,7 +82,7 @@ module ts {
         return array1.concat(array2);
     }
 
-    export function uniqueElements<T>(array: T[]): T[] {
+    export function deduplicate<T>(array: T[]): T[] {
         if (array) {
             var result: T[] = [];
             for (var i = 0, len = array.length; i < len; i++) {

doc/TypeScript Language Specification (Change Markup).pdf

@@ -114,6 +114,7 @@ module ts {
         Cannot_compile_external_modules_unless_the_module_flag_is_provided: { code: 1148, category: DiagnosticCategory.Error, key: "Cannot compile external modules unless the '--module' flag is provided." },
         Filename_0_differs_from_already_included_filename_1_only_in_casing: { code: 1149, category: DiagnosticCategory.Error, key: "Filename '{0}' differs from already included filename '{1}' only in casing" },
         new_T_cannot_be_used_to_create_an_array_Use_new_Array_T_instead: { code: 1150, category: DiagnosticCategory.Error, key: "'new T[]' cannot be used to create an array. Use 'new Array<T>()' instead." },
+        An_enum_member_cannot_have_a_numeric_name: { code: 1151, category: DiagnosticCategory.Error, key: "An enum member cannot have a numeric name." },
         Duplicate_identifier_0: { code: 2300, category: DiagnosticCategory.Error, key: "Duplicate identifier '{0}'." },
         Initializer_of_instance_member_variable_0_cannot_reference_identifier_1_declared_in_the_constructor: { code: 2301, category: DiagnosticCategory.Error, key: "Initializer of instance member variable '{0}' cannot reference identifier '{1}' declared in the constructor." },
         Static_members_cannot_reference_class_type_parameters: { code: 2302, category: DiagnosticCategory.Error, key: "Static members cannot reference class type parameters." },
@@ -180,8 +181,6 @@ module ts {
         The_right_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type: { code: 2363, category: DiagnosticCategory.Error, key: "The right-hand side of an arithmetic operation must be of type 'any', 'number' or an enum type." },
         Invalid_left_hand_side_of_assignment_expression: { code: 2364, category: DiagnosticCategory.Error, key: "Invalid left-hand side of assignment expression." },
         Operator_0_cannot_be_applied_to_types_1_and_2: { code: 2365, category: DiagnosticCategory.Error, key: "Operator '{0}' cannot be applied to types '{1}' and '{2}'." },
-        No_best_common_type_exists_between_0_1_and_2: { code: 2366, category: DiagnosticCategory.Error, key: "No best common type exists between '{0}', '{1}', and '{2}'." },
-        No_best_common_type_exists_between_0_and_1: { code: 2367, category: DiagnosticCategory.Error, key: "No best common type exists between '{0}' and '{1}'." },
         Type_parameter_name_cannot_be_0: { code: 2368, category: DiagnosticCategory.Error, key: "Type parameter name cannot be '{0}'" },
         A_parameter_property_is_only_allowed_in_a_constructor_implementation: { code: 2369, category: DiagnosticCategory.Error, key: "A parameter property is only allowed in a constructor implementation." },
         A_rest_parameter_must_be_of_an_array_type: { code: 2370, category: DiagnosticCategory.Error, key: "A rest parameter must be of an array type." },