Added $HTML option to UI.HTMLBlock
Added magic __init__ method to UI.HTMLBlock
Web/AppStruct/UI/ImageUpload.js draft implementation.
AppStruct UI: ImageUpload implementation.
AppStruct/UI/GenericModal: ModalClass config option added.
GenericModal: changed ModalClass option to apply to modal-dialog element
Workaround for bug in bootstrap 3.1.0
Base.V1: Added DateField