Fauxton: Add typeahead support to jump to doc

Simple type ahead support to check for start of id. It also checks if
document exists if not return back to _all_docs list
Missed a semicolon on the deferred
Our error handling was showing an object in the messaging.  I fixed it so it shows the "reason" part of the object.
Added clear:true to the notification for when a document doesn't exist so that it overwrites the generic error messaging