Adding returnConstPointerValue to MockActualCall.
Adding returnConstPointerValueOrDefault to MockActualCall.
adding support to returnConstPointerValueOrDefault to MockSupport.
Merge pull request #353 from katcipis/addReturnObjectPointerValueOrDefault

Add return const pointer value or default
Improve naming of _C wrapper macros
Oops. Forgot changing the tests
Merge pull request #355 from arstrube/c_macro_naming

(1) Improve naming of _C wrapper macros
Remove redundant extern declarations
Merge pull request #356 from arstrube/redundant_extern

(2) Remove redundant extern declarations