added ltree type
Merge remote-tracking branch 'origin/master'

* origin/master:
  Replace any_instance with allow_any_instance_of
  Upgrade DummyApp to Rails4
  fixing asset paths for wysihtml5
  Replace to_not with not_to and remove arguments to raise_error
  Convert to Ruby 1.8 hash syntax
  Replace stub with allow...to receive
  Replace stub! with stub
  Replace mock with double
  Replace should_receive with expect...to receive
  Excluding test.log from test_files
  Fix typo in README