[FEATURE] coding style improvements

This pull request bundles a lot of minor fixes regarding the coding style tests

 * adds coding style tests for superhirn library
 * test names now contain the full path (e.g., `FeatureFinderCentroided.cpp_cpplint_test` -> `src/topp/FeatureFinderCentroided.cpp_cpplint_test`)
 * enables coding style tests in travis-ci 
 * applied an uncrustify run to all files producing cpplint errors
 * additional cpplint/cppcheck fixes