Update cumulative similarities on save
Add note to update old similarities
Fix `test_create_similar` for filtered endpoint (instead of nested)
Test creating Similarity with UserSimilarity
Add test for updating UserSimilarity
Test duplicate similarities
Upgrade to djangorestframework==3.0.1
Merge branch 'recalculate-similarities' into drf-3
Fix similarities tests for DRF 3
Push cumulative weight calculation into the models
Merge pull request #30 from FreeMusicNinja/recalculate-similarities

Update cumulative similarities on save