Quickmark completion

gnah, I created a new branch on top of my importer commits... I guess I totally fucked it up this time.

Here is the quickmark completer. With lousy performance, any tips how to access the marks values more 'directly'? :>
`s/quickmarks/objreg.get('quickmark-manager')` after 74839d7affdaabd4899311c64e9f50a430a6ea3d