adding pull to refresh functionality to main screen.
fix bug where only the last the last section of retail "other" section was only section to show up,
because all the other sections get removed just before the next section is added.
Merge branch '2.4/feature/dining' into 2.4/feature/dining-pull-to-refresh
Merge branch '2.4/feature/dining' into 2.4/feature/dining-pull-to-refresh
Merge branch '2.4/feature/dining' into 2.4/feature/dining-pull-to-refresh
Merge branch '2.4/feature/dining' into 2.4/feature/dining-pull-to-refresh
Merge branch '2.4/feature/dining' into 2.4/feature/dining-pull-to-refresh
Merge branch '2.4/feature/dining' into 2.4/feature/dining-pull-to-refresh
add ActionBar pull to refresh library as a git submodule.
* prevent a name collision between MIT App and ActionBar-Pull-to-Refresh library, which was causing a crash
* make the pull to refresh layout look reasonable on 2.3 devices
* preserve the pull to refresh look for API 11 and higher