Scaled images for print edition and fixed errors up to the beginning of layouts chapter (#19835). Also major revision of Tree, CustomField, and layouts overview.
Vaadin is not anymore using the type of GWT History support that would need the __gwt_historyFrame iframe.
Change-Id: Ibd5414ddd744b3a570bb7b23700a616ca7ee56bf
* UIDL responses only include server side timing information when not
in production mode.
* Update documentation accordingly.
Change-Id: I961d1fdc96b3d04f22254fcd13a5412f17118b42
Fixed critically broken comment blocks, broken emphasis and escaping, and some other formatting, and moved book preface, chapter structure, and index to the docs repository.
Henri Sara
Marko Gronroos
Guglielmo Moretti
Jonni Nakari
elmot
Grzegorz Solecki
Markus Koivisto