fix(users): hash password when updating

SD-635
Merge pull request #222 from petrjasek/master

fix(users): hash password when updating
feat(tasks) - add backend support for tasks. SD-639, SD-399
feat(archive): implement autosave api

SD-613
Merge pull request #224 from petrjasek/master

feat(archive): implement autosave api
Merge pull request #223 from amagdas/tasks

feat(tasks) - add backend support for tasks. SD-639, SD-399
Use BaseModel.rel where needed
Use string type only when needed.
Merge pull request #225 from amagdas/tasks-cont

Use BaseModel.rel where needed