[Linaro-validation] Review of django-crowd-rest-backend-linaro

Hello,

Working on http://cards.linaro.org/browse/LAVA-109, I've forked the best matching Django backend for Crowd to add groups support as we need. I've finished adding new functionality and first round of testing, and appreciate a review. The changes can be found at https://git.linaro.org/gitweb?p=people/pfalcon/django-crowd-rest-backend-lin...

(Original project is hosted in hg, and I used recently discussed "git clone hg::<url>" syntax to clone to git. As you can see it didn't work ideally - original committer was imported as "Unknown". I didn't yet look into that issue, hints are welcome).