Merge pull request #124 from eile/master

Move external projects to config.extra
Update travis.yml
Merge pull request #125 from tribal-tec/master

Update travis.yml
ITK version and INCLUDE_SYSTEM needed to generate FindPackage files without config.extra
Merge pull request #126 from rdumusc/master

ITK version and INCLUDE_SYSTEM needed to generate FindPackage files without config.extra
Moved ITK config
Merge branch 'master' of github.com:Eyescale/Buildyard

Conflicts:
	config/ITK.cmake
Update CMake subtree and propagate lib type to projects (Eyescale/CMake#239)