Merge pull request #1 from voron3x/master

add prepare_task method for celery canvas workflow
Fixed bug TypeError("call() got an unexpected keyword argument 'agreement_id'",)
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
Add serializer support into tasks interface
Fix drop property serializer_class
property serializer_class revert
 Naive implementation of get-set method. One place for definition of task names
Missed GETSET in TASK_NAMES
Add check serializer class, fix property
GETSET became an atomic operation
Add test for serializer_cls
Copy task names from utils into Client class
Fix tests, add meta inheritance