Added topic support, more bootstrap styles

[derekeder]

Implemented topic classification support ( https://github.com/open-city/councilmatic/issues/21 ):

• created MetaData_topics tables
• displaying topic labels for each item
• topics are clickable and searchable
• topic classifier function defined in local_settings.py
• home page filtering out 'Routine' legilsation

  Bootstrap and content updates

• using bootswatch journal theme (swapped out standard bootstrap.css)
• added proper viewport meta tags for responsive layout
• made search page consistent with others (offset1)
• correct markup for navbar-search
• changed bookmark label to star icon
• added shinier RSS image
• support for custom footer content in local_settings.py

  Files to ignore

• aldermen headshots
• SQL script for setting aldermen headshots (also, see https://github.com/open-city/councilmatic/issues/22)
• about.html
• bootswatch journal theme css

[mjumbewu]

Just got around to merging this in. Lots of good updates.

[derekeder]

w00t!