Added tab bar style object.
Merge branch 'master' of github.com:beautify/beautify-ios into tabBar

Conflicts:
	Beautify.xcodeproj/project.pbxproj
Added a test view controller for the tab bar.
Added tab bar support. Incremented the JSON Version number to 1.6. For example JSON for the tab bar, see ValidTabBarStyle.json. The only thing missing from this file is a background image - all other available properties are present.

Fix for #182.
Removed duplicate property on tab bar style.
Merge pull request #201 from ChrisGrant/tabBar

Tab Bar