project: Import the wibble library (to be used for tests mainly).
Also it minght be usable for commandline parameters and/or configuration
handling.
The wibble library is authored mostly by Petr Rockai and Enrico Zini,
with additions of some other outhors mostly working on the DIVINE
model-checker (including me -- Vladimír Štill).
http://repos.mornfall.net/wibble/embeddable/
git: Update gitignore.
CMake: Add basic CMakeLists (so far just tests using wibble).
src: Add missing include in concurrentqueue.
src: Add unit tests.