Bump the rbintegrations dependency to 0.5 RC 1 dev.
Bump the rbintegrations dependency to 0.5 RC 1 dev.

This also caps the version to being less than 0.5rc2. Capping to 0.5
doesn't work, as easy_install gets confused and things 0.5rc1 doesn't
qualify.

reviewboard/reviewboard,chipx86/reviewboard,reviewboard/reviewboard,chipx86/reviewboard,reviewboard/reviewboard,chipx86/reviewboard,chipx86/reviewboard,reviewboard/reviewboard