Merge branch 'hotfix/save-changes-for-2.1' into develop

Conflicts:
	MagicalRecord/Categories/NSManagedObjectContext/NSManagedObjectContext+MagicalSaves.m
	Project Files/Magical Record.xcodeproj/project.pbxproj

2.0.8 - Fixing critical bugs

2.0.7 - fixing critical save bug

Fixing rookie mistake :/

Fixing rookie mistake :/

Add findFirstOrderedByAttribute:ascending:context: method for getting…

… min/max values easier