Partial update
Partial update tests
Merge pull request #3 from voron3x/master

new partial param for perform_changes
Merge pull request #4 from anatoliy-larin/master

Fixed bug TypeError("call() got an unexpected keyword argument 'agreemen...
#2 Up to v0.3
Add some docs
Code blocks syntax highlight
Set abstract = True for ModelChangeTask
Fix missed task names
# up to 0.4