moved /neo/libs to /libs, new version of /libs/openal-soft and removed /libs/mingw-hacks
moved build-scripts from /neo/ to /scripts and refactored cmake-buildscripts
cmake script paths fixed to point ../ instead of ../neo
library includepath and mingw-w64 fixes
Introduce Sys_GetLastErrorString(), is like strerror(errno) ..

.. but threadsafe and also works on Windows.

Replaced occurences of strerror(errno) with this and replaced
Warning-prints that used to print the (Win32) GetLastError() number
with this as well, so now we get a (hopefully more helpful) string
there.
build fixes for msvc
travis-ci.org instructions
build status on readme.txt->readme.md
Merge pull request #22 from OpenTechEngine/projectLayoutM

merge "mingw-w64 fixes and project layout change" to master