removed not-needed debug helpers
Merge branch 'voron' of https://github.com/ayende/raven.voron into voron
Merge branch 'voron' of https://github.com/ayende/raven.voron into voron
more meaningful exception
Merge branch 'voron' of https://github.com/ayende/raven.voron into voron
Merge branch 'voron' of https://github.com/ayende/raven.voron into voron

Conflicts:
	Voron/Trees/TreeRebalancer.cs
Merge branch 'voron' of https://github.com/ayende/raven.voron into voron
added debug journal and fixed multi-trees in write batch
minor
Merge branch 'voron' of https://github.com/ayende/raven.voron into voron