rename eventmixin
class task is parameterized
methods to override
senders
bump version
rename
refacor events
bump version
encode and decode datetime as json
refactor events
refactor class tasks
comments
Merge branch 'master' into docs

* master:
  comments
  refactor class tasks
  refactor events
  encode and decode datetime as json
  bump version
  refacor events
  rename
  bump version
  senders
  methods to override
  class task is parameterized
  rename eventmixin