Merge pull request #3 from Vicho/master

Remove script extension from mp_plot
GPLv3 statement added to every single python file
Version 0.2.4
Speeding it up using cython
Documentation includes Debian installation method
Merge branch 'optimization'

Cython becomes the default implementation for getSize
Version 0.3
Cython is installed *before* import
Version 0.3.1
use recommended way of getting the version number

pkg_resources.require() should not be called directly, it raises
DistributionNotFound() for tornado and nose in Debian (and probably
others).  get_distribution() gives you the version as well and is not
recommended against in the documentation, so use it.