Merge pull request #2 from prsnca/master

pull Yaron 'login and logout fixed' commit
temporary RTL fix for registration form
Add style to homepage lessons table
display next 4 upcoming lessons sorted by date
fix date format + time left tooltip
fix StudenClassTime unicode + refactoring Lesson
Changing app back to English
Merge branch 'master' of github.com:itayB/yoga

Conflicts:
	lessons/templates/lessons/index.html
Update Model, delete table, add 'signup' & 'remove' buttons
Fixing 'spots left' logic
bug fix - hide signup button when user already signed in
Merge pull request #3 from itayB/master

You can pull now :)