Improve compatibility for finding other name format python libraries.

[ar90n]

When I build this project on Ubuntu machine, I went into some troubles.
These troubles were caused by the followings.

• CMakeLists.txt finds only libboost_python.so or libboost_python3.so.
  So other name format library such as libboost_python-py35.so canot be found.
• FindPythonLibsNew.cmake finds only libpython${MAJOR}.${MINOR}.so.
  So libpython${MAJOR}.${MINOR}m.so cannot be found.

I fixed above issues. Please review this pull request.

[TallJimbo]

@ar90n I'm sorry this has lingered for so long, but could you please try with the latest master to see if it also fixes your problem? I suspect #56 may have fixed it.