Fixed _Generic mpack_write() string literals under Clang

Removed unnecessary mpack_file_reader_t

Merge branch 'develop'

Merge branch 'develop'

Merge branch 'develop'

Merge branch 'develop'

Merge branch 'develop'

Improved documentation

Added valgrind-suppressions to amalgamation package

Merge pull request ludocode#4 from chris-heijdens/master

removed return statement inside of test_free which returns void