* Added raw HTML slot
* Widgets can now participate in deciding if the area containing them is empty or not. (Some widgets can be saved with zero items in them and it's useful to think of them as empty when making layout decisions with aposAreaIsEmpty.) Slideshows, buttons, files and rich text all participate. Widgets that don't have an 'empty' method are assumed to always constitute a non-empty area
* Fixed dumb bug in apos.escapeHtml
Merge branch 'master' of github.com:punkave/apostrophe