Merge pull request #79 from ingmar-getzner/master

added plot function for eucl. Tsp
PEP8 warnings fixed in tep.py
fix CMake warning CMP0042 relating to rpath
Merge pull request #81 from dhennes/master

fix CMake warning CMP0042 relating to rpath
PEP8 warning fixed
restoring cec2013.cpp
made the inverover algorithm independent of the weight matrix