Add latest PagerSlidingTapStrip.

- Exported on 2013-01-02.
Re-add tab click listener support for PagerSlidingTabStrip.

- Original patch is at
https://github.com/UweTrottmann/PagerSlidingTabStrip/commit/572b711fbc35b571c00c091e8ee72af1b7ac92f3.
PagerSlidingTabStrip moved to a different package.

- Rename also in layout files from
com.astuetz.viewpager.extensions.PagerSlidingTabStrip to
com.astuetz.PagerSlidingTabStrip.
Initial support for activity streams inside shows section.
Correctly remove first run fragment.
Re-add filters to activity tabs.
If launching from a notification, try to set last cleared time.
Point all refs of UpcomingRecentActivity to ShowsActivity.

- Modify widgets: drop icon as title now goes to shows activity. In
compact mode icon opens correct tab in shows activity.
- When coming from a multiple episode notification, show Upcoming tab.
- Drop Activity from nav drawer.
Drop all unused code, layouts and resources for UpcomingRecentActivity.

- Also removing it from the manifest.
- Remove 'Activity' string.
Drop refs to details fragment in upcoming and friends fragment.
Rename everything 'Upcoming' to 'Activity'.
Break activity into columns on larger screens.
Merge branch 'activity-in-shows' into beta