Add inspection on return stmt
extract some methods from functionCallInspection, to be reusable in other  inspections, GoTypeInspectUtil.java
added @ChangeReturnsParametersFix to change the function return parameters
Merge pull request #563 from m0sth8/master

Add tests for issue #528
fix and add a few more Tests, properly handle whether return is a function call
add change log and few tests
Merge pull request #562 from josehsantos/return_inpection_and_fix

Add an inspection to check the type of the returned expressions
Add dev version warning
Added command line switch to skip dev warning
Merge pull request #568 from dlsniper/dev-warning

Add dev version warning
Fix issue with nil value as function parameter and return parameter, on inspections
Merge pull request #569 from josehsantos/fix_520

Fix: Improve functionCall and functionReturn inspections to handle the nil values correctly. (fixes #520)