initital test for variable subscribe with functions
skip test for multiple sbscribers
operations now take subscribers, and they can be functions
Merge branch 'bug/#7-subscribe-with-functions'
Closes #7

* bug/#7-subscribe-with-functions:
  operations now take subscribers, and they can be functions
  skip test for multiple sbscribers
  initital test for variable subscribe with functions
fix jscs validation
Release v0.8.2