Incorrect shebang

[cauebs]

Current shebang is #!/usr/bin/python, but python2 shouldn't be considered default anymore. This will only work correctly on less sane linux distributions (debian-based, I suppose). To avoid ambiguity, it should be #!/usr/bin/python2, which should probably work everywhere.

Edit: it should actually be installed with pip2, then it will work. Still, it should be specified in README.md