Added sidebar PHP file as include.
Renamed PIB settings CSS classes and set to use ID attribute.
Now using Bootstrap and Flat UI CSS.

Also created sample button.
Flat UI checkbox glyph from custom font now working.

Also trying outlined box like Flat UI tagsinput class.
Added lightly shaded Flat UI sidebar container sample...

to compare with outlined box container.
Moved fonts folder (for Flat UI) up one level.
Sidebar marketing text and styles update.
Added PIB_UPGRADE_URL_BASE constant.
Google analytics campaign URL for upgrade added.

Updated some upgrade marketing text.
Merge pull request #3 from pderksen/settings-layout

Settings layout updates.