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Upgrade Stats when the app is moved from Background to Foreground. Also improved the code that handles application lifecycle events.
Switch back to the correct timeout
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Add a timestamp that prevents refreshing stats in background if "last-refresh" time is less than 30 minutes.
Merge branch 'issue/1246-preloading-Stats' of https://github.com/wordpress-mobile/WordPress-Android into 1246-preloading-Stats

Conflicts:
	src/org/wordpress/android/WordPress.java
	src/org/wordpress/android/ui/WPActionBarActivity.java
Update the Stats timer when the user refreshes stats in Foreground.
Fixed bug that caused post list not to load after rotation
Code cleanup
Merge pull request #1268 from wordpress-mobile/issue/1265-remove-preemptive-http-auth

Remove pre-emptive HTTP authentication on self-hosted blogs protected with HTTP Auth
2.7.3 version bump
Merge branch 'master' into develop
Moving some strings in WPStatsTrackerMixpanel to constants.
Moving the tracking of "Application Opened" people property.

Was previously tracking this on initialization of Mixpanel but shifted
this to it's proper place along side the Application Opened event.
Fixing style violations in WPStatsTrackerMixpanel.
fix #1270: created blog is public
Fixing style violations in WPStatsTrackerMixpanelInstructionsForStat.
Updating some style violations in PostsActivity.java
Fixing style violations in PostUploadService.
Fixing style violations for a few files.