Report UI Improvement - Tabbed interface

Pull in work done by Brian on http://dev.nysenate.gov/issues/6440.

Original Spec - http://wiki.civicrm.org/confluence/display/CRM/Report+UI+Improvements.

Some notes:
===========

• There are ~6 commits (excluding merges).

• Changes are mostly in report tpl files (of core) and css (additional css).

• Tabs have been created / structured in tpl file itself. Assuming we don't need a tab style like contribution/events (tabs created via php), this looks better, as there is no real need of firing a new ajax call for each of the tabs. The changes are quite clean & clear.

• It feels tempting to further structure the criteria.tpl so that all tabs have their own tpl. We might also want to do some renaming like - changing fields.tpl to configuration.tpl, instance.tpl to Configuration/settings.tpl ..

• Updating report has a confirmation process which looks useful and could be pulled in.

• We will need to make sure tabs display / hide works based on permissions. Looking at the code it seems it will work.

• Some reports have their own custom tpl and will require an update once we merge / improve the changes.