Fixed Etag(string) ctor
Revert the revert of "update actipro"
Reason: we have a license to updated the server with

This reverts commit d66b8116dc48e9052f4192d9500482f3978d7fd6.
Make the number of items to cache/pre-fetch for indexing configurable (same default value as MaxNumberOfItemsToIndexInSingleBatch)
Add a util method to generate the Settings.dat
Merge branch '2.5' of github.com:e-tobi/ravendb into 2.5