fixes for failing unit tests
Merge branch '2.5-voron' of https://github.com/ppekrol/ravendb into 2.5-voron

Conflicts:
	Raven.Database/Storage/Voron/StorageActions/DocumentsStorageActions.cs
	Raven.Database/Storage/Voron/StorageActions/StalenessStorageActions.cs
Merge branch '2.5-voron' of https://github.com/ppekrol/ravendb into 2.5-voron

Conflicts:
	Raven.Database/Storage/Voron/StorageActions/AttachmentsStorageActions.cs
	Raven.Voron/Voron/Impl/WriteBatch.cs
git pull from ppekrol/2.5-voron
Merge branch '2.5-voron' of https://github.com/ppekrol/ravendb into 2.5-voron
Squashed 'Raven.Voron/' changes from c92280f..6ca0fb4

6ca0fb4 fixed issue with TreeRebalancer not copying NodeFlags when node is MultiValuePageRef

git-subtree-dir: Raven.Voron
git-subtree-split: 6ca0fb4f13a692e925f91646ff263c2cb10f555a
Merge commit '07fe15c543a143b3fe88f8f56237a41742622db8' into 2.5-voron

Conflicts:
	Raven.Voron/Voron.Tests/Bugs/PageSplitter.cs
	Raven.Voron/Voron.Tests/StorageTest.cs
	Raven.Voron/Voron.Tests/Voron.Tests.csproj
	Raven.Voron/Voron/Trees/Tree.cs
	Raven.Voron/Voron/Trees/TreeRebalancer.cs
Merge branch '2.5-voron' of https://github.com/ppekrol/ravendb into 2.5-voron
tweaked bug fix --> so MoveLeafNode() in rebalancer will copy source node's flags
StorageEnvironment::TransactionCompleted() changes to _trees collection are now atomic
Making sure that we are always using the _latest_ pager state visible to the transaction, not the global pager state.
Squashed 'Raven.Voron/' changes from 6ca0fb4..9cd530e

9cd530e minor
621fc44 Making sure that we are always using the _latest_ pager state visible to the transaction, not the global pager state.
3204483 Skipping long running tests
5f62d84 Fixing tree rebalancing for ref page nodes. Refactoring add node implementation - should be less susceptible for bugs
8b60389 tweaked bug fix - MoveLeafNode() will copy any flag from source node

git-subtree-dir: Raven.Voron
git-subtree-split: 9cd530e34189c8b730a80ed3ca6398a79a33d268
Merge commit 'a0e5a9e0d106f22a644ae27b0440002c4ad096bd' into 2.5-voron

Conflicts:
	Raven.Voron/Voron.Tests/Bugs/PageSplitter.cs
	Raven.Voron/Voron/Impl/AbstractPager.cs
	Raven.Voron/Voron/Impl/MemoryMapPager.cs
	Raven.Voron/Voron/Impl/PureMemoryPager.cs
	Raven.Voron/Voron/Impl/Transaction.cs
	Raven.Voron/Voron/Trees/Page.cs
	Raven.Voron/Voron/Trees/PageSplitter.cs
	Raven.Voron/Voron/Trees/Tree.cs
	Raven.Voron/Voron/Trees/TreeRebalancer.cs
Merge branch '2.5-voron' of https://github.com/ppekrol/ravendb into New3-voron

Conflicts:
	Raven.Tryouts/Program.cs
switched voron to .NET 4.5
fixing issue with deleting mapped results from different index in esent