Removing working directory imports.

Needed for having more build directories from same checkout directory
(not fully done yet).
fix include guard endif
Fix memory leak in StringFeatures
CID 26248, 26247, 26246, 26241, 26239, 26236, 26235, 26236, 26234
Refactor CPack [ci skip]
Fix ViennaCL detection [ci skip]
blacklist mmd2 example
close is needed by ruby
comment out syntax failure in clang python modular travis
Fix trivial warnings (unused variables) in Statistics unit test.
remove all print statements
Fix more warnings from the buildbot in deb3 Python modular.
remove integration tests, first step