Theming - Change all internal templates to work with Twitter-Bootstrap CSS framework

[jtickle]

Make sure it is possible to run a bootstrap theme under 1.8.x.

[jtickle]

Collect all of the appropriate existing templates into a "compatibility" theme

[Stardog]

Old themes work in 1.8.1 if the compat templates directory is copied over: https://github.com/AppStateESS/phpwebsite/wiki/Bootstrap-compatibility

Updating old templates will be an ongoing process. Lets move this up.