allow custom id separator
fix attribute error
catch KeyError
remove ordering for count queries
Merge remote-tracking branch 'upstream/master'
limit the splitting of pk as defined by model

Conflicts:
	tornado_restless/handler.py
Merge pull request #5 from qudos-com/master

Apply pull requests #5
- allow custom ID seperator
- remove order_by in count query
- catch keyError in to_deepe
- fix NoResultFound error message