Debianisation

I've updated debianisation scripts for stacktach. 

Package installs stacktach and brings all related software (including all available in repo python modules) needed to run.

Currently python module Pympler is missing in official ubuntu repo and South module is not suitable version (0.7.5), so I have built python-django-south and python-pympler packages for myself. 

I suppose that South>=0.8 and Pympler will be available in official repo soon. Options to run stacktach on ubuntu 14.04 for now are: 

1. Build and install python-pympler and suitable python-django-south before for yourself
2. Share my python-pympler and suitable python-django-south and add repo
3. Remove python-pympler and python-django-south from dependencies manually and use pip or easy_install to get that two modules

Works well for ubuntu trusty tahr 14.04 LTS and may work for older releases (like 12.04)