Fix a CSRF problem with password recovery.
Fix a CSRF problem with password recovery.

Passowrd recovery was broken due to a CSRF (Cross Site Request Forgery)
configuration problem. The CSRF token wasn't provided in the recovery form.
We now use the {% csrf_token %} template tag to add it.

Fixes bug #1723

1tush/reviewboard,chazy/reviewboard,1tush/reviewboard,atagar/ReviewBoard,Khan/reviewboard,chazy/reviewboard,KnowNo/reviewboard,atagar/ReviewBoard,Khan/reviewboard,sgallagher/reviewboard,atagar/ReviewBoard,KnowNo/reviewboard,chipx86/reviewboard,Khan/reviewboard,bkochendorfer/reviewboard,sgallagher/reviewboard,sgallagher/reviewboard,1tush/reviewboard,reviewboard/reviewboard,chazy/reviewboard,davidt/reviewboard,beol/reviewboard,atagar/ReviewBoard,custode/reviewboard,brennie/reviewboard,atagar/ReviewBoard,reviewboard/reviewboard,chazy/reviewboard,chazy/reviewboard,KnowNo/reviewboard,chazy/reviewboard,chipx86/reviewboard,beol/reviewboard,davidt/reviewboard,reviewboard/reviewboard,Khan/reviewboard,brennie/reviewboard,brennie/reviewboard,atagar/ReviewBoard,1tush/reviewboard,atagar/ReviewBoard,1tush/reviewboard,custode/reviewboard,1tush/reviewboard,1tush/reviewboard,custode/reviewboard,chipx86/reviewboard,chipx86/reviewboard,Khan/reviewboard,chazy/reviewboard,chazy/reviewboard,1tush/reviewboard,Khan/reviewboard,Khan/reviewboard,bkochendorfer/reviewboard,custode/reviewboard,1tush/reviewboard,davidt/reviewboard,Khan/reviewboard,davidt/reviewboard,reviewboard/reviewboard,chazy/reviewboard,atagar/ReviewBoard,brennie/reviewboard,KnowNo/reviewboard,Khan/reviewboard,beol/reviewboard,bkochendorfer/reviewboard,bkochendorfer/reviewboard,atagar/ReviewBoard,sgallagher/reviewboard,beol/reviewboard