Working State of the new tests Makefile... (not functional)
Improved the tests makefile.

The compiled output is now completely saved in the output folder (out)
The libARA and omnetARA tests can now be build and run seperately :)
The makefile targets in tests/ do now create symlinks to the test exectutable
Made the CppUTest Framework a git submodule
Added makefile target for libAra tests only
Fixed submodule issue for cpputest
Fixed the tests include path for make
Wrote configuration for travis CI
Merge branch 'ci' into develop
Removed obsolete Makefile target