PeoplePods theme that uses Twitter Bootstrap CSS styling and layout

Initial commit on new theme focuses primarily on navbar and layout,
though a few buttons and such were changed too. Later versions will
update other UI elements to be more bootstrap-ish.
check to make sure callback is set

check that callback is set before reference to avoid errors in log file
Merge branch 'callback-error' into Bootstrap-theme
Revert "Merge branch 'callback-error' into Bootstrap-theme"

This reverts commit 9c0e898154880598bacb31430a69f58ba480ef1c, reversing
changes made to 76a66d256045d4f4fb2f22c88c790b01c54a0961.
check existance of callback parameter

check that callback exists before reference to avoid error messages in
log
Merge branch 'callback-error' into develop
Merge branch 'Bootstrap-theme' into develop