Declare support for Python 3.x in setup()
Appveyor: Enable Python 2.6, 3.x and x64
Appveyor: Install swig using Chocolately
win32: Declare variable to fix Python 3.x/MSVC ...
Fix failing TestUtil.test_toGSM3_38Bytes()
Add tox support and coverage reports, run test ...
Enable Python 3.3 & 3.4 under Travis & Tox
Fix pylint unused-import warnings