Add an option to hide the actionbar in reviews and lessons
Get rid of jar dependencies and use gradle instead

I have no idea why I used jars for these to begin with... -.-
Remove NumberPickerBackport from README
Fix remaining radicals card height not scaling properly
Don't hide the action bar extension whil scrolling in progress details
Fix locked items not being shown among remaining items
Don't show all critical items in dashboard

Show only a specific number of critical items in dashboard and display a 'MORE ITEMS' button leading to an activity which displays all critical items
Fix statusbar issue on Kitkat in progress details

(caused by my carelessness in a previous commit...)
Merge remote changes
Quick fix wrong didivder placement in settings
Fix crash when trying to view details of some radicals
Bump app version to 1.0.3