Squashed 'Raven.Voron/' changes from 02f52ca..0ee3ef6

0ee3ef6 minor
489d288 better skip in iterators

git-subtree-dir: Raven.Voron
git-subtree-split: 0ee3ef6771e41d7c7dab8c328326880abf6caf9a
Merge commit 'be11b2f3ed8b1248695576f701db81436d9086c1' into 2.5-voron

Conflicts:
	Raven.Voron/Voron/Trees/EmptyIterator.cs
	Raven.Voron/Voron/Trees/IIterator.cs
	Raven.Voron/Voron/Trees/SingleEntryIterator.cs
	Raven.Voron/Voron/Trees/TreeIterator.cs