Use libqes, also misc CMake fixes

Remove kmlib submodule, refactor all names to libqes, use system LIBQES,
add FindLIBQES.cmake, and fix up git version strings a bit.
Install libqes in travis CI

Also try setting up caching of contrib stuff (zlib, libqes).
Fix travis CI builds

Fix cmake error in libqes install in travis ci

Forgot the ..

Add zlib root to cmake in travis ci config

Use git clone --recursive to get libqes

fix travis

Another attempt at fixing travis ci

Nope, we'll install to /usr/local

Fix root paths in builds

Don't cache stuff in travis ci
Fix FindLIBQES and the Release CFLAGS in cmake

Fix FindLIBQES

Fix cmake optimisations
Add libqes as a submodule and set it up in cmake

It now all works the same way kmlib did
README: rename kmlib to libqes
Update libqes to v0.1.0 release