Add ofxRadioList base code
Add ofxGuiGroup as the container for toggles
Add event that notifies its listeners about selected radio button/toggle
Add getTitle() method to ofxRadioList
Fix ofxRadioList to work with ofxSourcesEditor
Add getItemName method
Add enable and disable methods
Add storedLabels and storedTitle variables for recreating toggles on enable
Add clear method
Fix ofxSourcesEditor to work with ofxRadioList
Not showing source list if there is no surface selected
Replace ofxUI dependency with ofxGui
Fix link to A successgul Git branching model article
Fix there is no need for a guiGroup label item as it has a header already
Position image source selector