introducing multi line text input
Merge branch 'text-area' into develop
adding in ofxUIMultiLineTextWidget to ofxUIDefines and ofxUIWidgets
fixed merge conflicts
fixing more merge conflicts
fixing minor errors
made ofxUIMultiLineTextInput a friend of ofxUITextArea, so that it can access the protected member variable textLines. ofxUIMultiLineTextInput uses its ofxUITextArea so heavily that I think this makes sense
Merge branch 'text-area' into develop