Switch to cpythons file object implementation

[undingen]

Switches to the cpython file object implementation and printing code.

This makes us pass the following cpython tests:

• test_file2k
• test_file_eintr
• test_print
• test_softspace

This also make use now call much more often into tp_print which we do not implement for many types. I think in the future we should add them because this functions can directly write to a file descriptor instead of having to always write into a buffer. I had to add it for the dict type because the default dict implementation requires it.

In addition fixes a pyopenssl integration test error:

ERROR: Random data can be saved and loaded to files with paths specified as
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/marius/pyston/build/Release/from_cpython/Lib/unittest/case.py", line 329, in run
    testMethod()
  File "/home/marius/pyston/pyopenssl_test_env_pyston_release/site-packages/OpenSSL/test/test_rand.py", line 219, in test_unicode_paths
    self._read_write_test(path)
  File "/home/marius/pyston/pyopenssl_test_env_pyston_release/site-packages/OpenSSL/test/test_rand.py", line 184, in _read_write_test
    with open(path, "w"):
UnicodeEncodeError: 'ascii' codec can't encode character u'\u2603' in position 11: ordinal not in range(128)

[kmod]

Tiny, but we can remove the "Pyston change" comment

[kmod]

lgtm!

[undingen]

merged with a fix witch increases the travis ci timeout to 30min from 20 because the debug build hit the limit.