ifcontains tag is added
formatting for pep8
ifcontains tests
tests formatting for pep8
readme is updated
fixing to be more concise
Merge branch 'laplacesdemon-master'

* laplacesdemon-master:
  fixing to be more concise
  readme is updated
  tests formatting for pep8
  ifcontains tests
  formatting for pep8
  ifcontains tag is added
Better name for node used by ifcontains tag