Add Travis CI metadata
Use sf.net submodules for travis
Install lua before make'ing
Use Lua 5.2 including development headers
Get build dependencies in the before_install step
Also test with c99 features turned off
Merge branch 'master' of github.com:raboof/notion into travis
Empty string into C99_SOURCE ?
Merge branch 'master' of github.com:raboof/notion into travis
Don't test clang without C99 support

Let's be friendly to the nice Travis folks
Merge branch 'master' of github.com:raboof/notion into travis

Conflicts:
	.travis.yml
Merge branch 'master' of github.com:raboof/notion into travis
Merge branch 'master' of github.com:raboof/notion into travis
Merge branch 'master' into travis

Conflicts:
	.gitmodules
Use travis for all branches

As we've gotten rid of submodules, and travis doesn't require
too much github authorization anymore, we can now enable travis
for all branches! Cool!