Badges on readme

[ketan96-m]

1. Added badges on the readme page

2. Changed heading for command line page

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 82.32%. Comparing base (c555974) to head (665bb0d).
Report is 5 commits behind head on 3.0_develop.

Additional details and impacted files

@@             Coverage Diff              @@
##           3.0_develop     #461   +/-   ##
============================================
  Coverage        82.32%   82.32%           
============================================
  Files               26       26           
  Lines             1386     1386           
============================================
  Hits              1141     1141           
  Misses             245      245           

Flag	Coverage Δ
unittests	82.32% <ø> (ø)

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[ketan96-m]

Added a change for the command line interface page heading

[gordonwatts]

Nice!