Feature/py3 run

[rachmadaniHaryono]

hi, i add test for this program along with some modification. here are the list of change that not shown on commit.

• test
• change in travis setting
  • add pandoc and python-eyed3
  • disable python2.6 and 3.2
    • python2.6: python -m flake8 not working.
    • python3.2: eyed3 is not working on travis-ci
• change bin/instantmusic script: use simple python main function call. the code there is moved to proper place and tested.
• change setup.cfg and setup.py: put them on root project folder.
• package
  • add requirements-dev.txt for testing
  • add required package for program (eyed3, request)
• program
  • simplify query_and_download : move part of the code to subfunction
  • rename makeRequest to make_request
  • catch error on python3