Add basic implementation statistics bar graph

- The bar graph will show percent of students who have completed a
certain level. Keep in mind this is not a dynamic function and will
always assume there is 50 levels in the system. The implementation is
done like that due to time constaints.
- Fix a crash in which the logged in account would be deleted when
quiting statistics page
Add .svn* to .gitignore
Merge branch 'master' of https://github.com/TeamRedundantTeam/SoundOutPhonics

Conflicts:
	Sound Out Phonics.xcodeproj/project.pbxproj