More details on home page

These changes allow for a more detailed display of the status of episodes on the "home" page. This is represented by a color coded pie chart of downloaded, snatched, wanted, ignored/skipped episodes. This chart replaces the downloaded progress bar. In simple mode the pie chart is replaced with a color coded numeric count of the number of episodes in each state. There are also minor corrections to the default css (the text for snatched was pink instead of dark grey). There are also indentation changes in home.tmpl and common.py. These are a result of running retab in vim. They do make the diffs harder to read (sorry for that) but I committed them before realising that many lines had been affected. 

The pie charts are created using jqplot (http://www.jqplot.com).

Note: I haven't tested the above on anything other than Firefox 18.0.2. and Google Chrome 26.0.1410.63.