- file/class templates are now installed for both iOS/OSX
- fixed improper usage of RLM_OBJECT_PROTOCOL in docs
plugin now installs Xcode 6 Swift/Objective-C templates
Merge branch 'master' into jp-osx-templates

* master:
  Add link to contribution guide to README.
  Fixed the indentation
  Add contribution guide
  Use the NSURL class method fileURLWithPath: rather than URLWithString to prevent the app from crashing if there are spaces or special characters in the filename
added /usr/libexec to PATH to simplify PlistBuddy usage
Merge pull request #600 from realm/jp-osx-templates

File/Class templates are now installed for both iOS/OSX