[KLMB/YAGGLER/SAMPLES]: Added a sample (a simple copy of the dev sample for the moment) to test/dev/show klmb.
[YAGGLER/CLANG]: fix'd clangs 3.3 warnings about C++1y and non-const constexpr members.
[YAGGLER/.gitignore]: added the build-clang/ folder (used on my computer to test clang builds)