Merge pull request #4 from Krastanov/wip

Wip
More work on listing the stenograms and generating HTML.
Merge pull request #5 from Krastanov/wip2

More work on listing the stenograms and generating HTML.
Graceful degradation on missing excel files.
Better stenograms.html page - grouped in months.
Merge pull request #6 from Krastanov/wip3

Wip3
Include 2011 by default and switch to cPickle from shelve for the DB.
Merge pull request #7 from Krastanov/wip4

Include 2011 by default and switch to cPickle from shelve for the DB.
Add index, contacts and google tracking.
Merge pull request #8 from Krastanov/index_page

Add index, contacts and google tracking.
Permit spelling errors in the regex that scans the stenogram's text.
Merge pull request #13 from Krastanov/regex_in_stenograms

Permit spelling errors in the regex that scans the stenogram's text.
Add graph of registrations and mails of MPs.
Correct the registrations graphs (clear after saving)
HTML and CSS changes
Add graphs for each vote during each session.
Add png optimization.
Correct the percentage sorting in the html tables.
A lot of new graphics on the session level and png optimization.
Fix a memory leak. Closes #16.