[INTERNAL] colours added
[DOC] docu updated
[INTERNAL] cluster() simplified
[TEST] added SuperHirn library to style tests (addendum to #764)
[TEST] added full path to style test names

 * e.g., FeatureFinderCentroided.cpp_cpplint_test -> src/topp/FeatureFinderCentroided.cpp_cpplint_test
[BUILD,TEST] added coding-style test to travis
[TEST,CI] disabled building when doing style tests (reduces runtime)
[TEST,CI] install missing cppcheck on travis-ci machines
[TEST,CI] fake 0 build errors for style testing
[NOP,STYLE] semi-automatic run of uncrustify on all files raising a cpplint error
[NOP] fixes a cpplint/cppcheck errors
[BUILD,TEST] ignore MSNumpress.cpp in cppcheck, cpplint tests
[INTERNAL] exceptions added
[API] pass by const reference
[API] pass by const reference
[API] pass by const reference
[API] pass by const reference
[API] pass by const reference
[INTERNAL] index bug fixed (Point -> CellIndex)
[INTERNAL] index bug fixed