Added Travis.ci integration
Conflicts resolved
Merge branch 'master' into version-0.5
Merge branch 'master' into version-0.5
Allow user to specify a UIImage as the title for a nav bar button item.
Update readme to note that UIImages can be sent to create UIBarButtons
Update test app rakefile for RM2.0 syntax
Add tests for creating a UIBarButton with a UIImage.
One more test to make sure it's the RIGHT image ;)
Added Winston-Salem Crime Map to the list of apps that use ProMotion.
Merge pull request #68 from markrickert/add-app-to-readme

Added Winston-Salem Crime Map to the list of apps that use ProMotion.
Added tests for the left bar button item.
Clarified app_delegate code
Merge pull request #67 from markrickert/version-0.6-imagebuttons

Allow user to specify a UIImage as the title for a nav bar button item.
Switched demo app link
Changed set_nav_bar_button to accept a system_icon hash key that allows creation of system buttons like add.
Fix linebreak in the readme.
Merge branch 'master' of https://github.com/sxross/ProMotion

Conflicts:
	lib/ProMotion/screens/_screen_module.rb
Merge pull request #70 from markrickert/version-0.6-imagebuttons

Fix linebreak in the readme.
Fixed system item in set_bar_bar_button to take UIImage change into account; updated README