Load event tabs in background.
Doesn't work: PreseasonEvents fragment never gets updates to it's correct content when tab changes
Bug where first tab didn't get updated on tab strip update fixed
reload all tabs when the headers change. This ensures synchronization between tabs and content
Merge branch 'master' into background-event-tabs

Conflicts:
	android/src/main/java/com/thebluealliance/androidclient/adapters/EventsByWeekFragmentPagerAdapter.java
Started fixing some rotation problems. Content still doesn't appear after changed year + rotate
Background events tabs should be all set now. Content doesn't disappear randomly anymore
add progress bar to eventlist fragment to indicate loading tabs, as well
remove stray progress bar
Tabs correctly save selection everywhere now. Couple fixes for Android 4.0.x
fix one more stray progress bar
save tab position on refresh
Fix bug where refresh progress wouldn't stop after year change + rotate
Merge pull request #202 from the-blue-alliance/background-event-tabs

Background event tabs