Update README.md
Get rid of the selection debugging
Minor refactor in state
Move navigator to state and disable it for now

We focus on reviewing stuff right now and come back to enabling
navigation again later. Right now we can only display a single sentence
per route.
Plan to return a source in resource get requests
Add a primitive documentStore

Just a helper for now
Reset the docStore when the application loads
Add review skeleton
Make Resource finally a newable factory
Rename resource file in index
Rework BspMorphRetriever to a newable factory
Rework TreebankRetriever to a newable Factory
Add configurator.getRetrievers

Hides the fact that we changed the syntax of the retriever services
a bit.
Use new configurator function in state and morph
Let getRetrievers return an {}, not an []
Restructure staging2 for new conf syntax
Wrap contextMenus in div for easier dom inspecting
Change dependencyTree a little bit

Works now as attribute, not as an element and should be placed on an
svg element. Has several benefits.
- We don't have to guess what the svg element is d3 needs to select.
- We can style the svg in templates.
- We can draw several trees in a single page more easily
Refactor and update dependencyTree directive

We know listen to changes of head ideas and can re-render the tree...
Finally scope isolation for dependencyTree