Add initial infrastructure.
Add first application stub for OSX.

Not yet running as MacOSX bundling tricks are not adopted.
Add initial osx bundle support.
Fix osx bundle plist creation.
Add osx interface builder file.
Change names in osx interface builder file.
Add initial CMake file for gtk version.
Add a WebView to the osx app.
Run substance in native app.
Merge branch '0.5.0' into native_app
Added build instructions.
Use relative image urls. Ensure min-width of window view.
Make webview use the full window space.
Update UI according to annotation updates.
Improved Operations API, with support for document properties. Fixed deletion of head and tail nodes.
Update doc template to conform to the changed Operations API. Also added title + abstract.
Expose document title / abstract. Allow partial updates on them using the new set command that also takes a text OT.
Fix comments.
Use the newish document model API.
An all new surface. Again.