Link to CONTRIBUTING.md file rather than edit.
Merge pull request #414 from willrax/fix-readme-link

Link to CONTRIBUTING.md file rather than edit.
Adding title as UIImage functionality.
Merge branch 'refs/heads/title_image' into edge

Conflicts:
	Gemfile.lock
Updating PM::Screen `resolve_title` if block to support UIView, and else with warning.
Fixing typing in `resolve_title` if block
Adding specs for new PM::Screen title functionality.
Merge pull request #415 from forrestgrant/edge

Allowing screen title to be UIImageView