Merge pull request #1091 from ppekrol/2.5

fixed already disposed IndexReader issue that could occur after index recovery
RavenDB-2431 Make sure in-memory-indexes get written to disk when disposing the document store
Merge pull request #1092 from ppekrol/RavenDB-2431

RavenDB-2431 Make sure in-memory-indexes get written to disk when dispos...
Removing test for a removed feature
Merge branch '2.5' of github.com:ayende/ravendb
Better restore log
Will not try to load into the prefetcher queue more than twice the amount we can send in a batch
Properly notify the prefetcher about timing, size of documents and errors when they happen
Merge branch '2.5' of github.com:ayende/ravendb
Ensure that we aren't loading TOO much data to the prefetcher
RavenDB-2332 Take time to load as a component in prefetcher
Adding the ability to call from one transformer to another(s)
new index validation after power-failure (or crash)