Fix compilation of Timepixdummy Producer
Ignore downloaded folders extern/ZestSC1 and extern/tlufirmware.
This only becomes relevant when merging PR #1.
correct typos in CMake's ADD_DEFINITIONS statement: -D is required!
Merge pull request #1 from hperrey/master

TLU producer's requirements now found (and installed) through CMake & minor cleanup
Merge branch 'master' of https://github.com/eudaq/eudaq

Conflicts:
	.gitignore
	producers/eudrb/CMakeLists.txt
	producers/vme/CMakeLists.txt