Use much faster locking model for getting app settings
Lock when reading faves
Revert "Share link inline for now"

This reverts commit c12dbf89469554d333e29c9c821f1946cd69f2ef.
Update version to 1.8.3
Merge branch 'master' into adfree

Conflicts:
	TodayILearned/MainPage.xaml.cs
	TodayILearned/Properties/WMAppManifest.xml
	TodayILearned/Utilities/BuyThisAppTask.cs
Fix showing OJ facts all the time
Merge branch 'master' into adfree

Conflicts:
	TodayILearned/Properties/WMAppManifest.xml