RavenDB-2962 Status -> Indexing Costs
Ensure that we pulse the transaction while purging long lists
RavenDB-3010 Detect 3.0 client against 2.5 server and error on that.
Merge branch 'RavenDB_3010' of https://github.com/ml054/ravendb
Merge branch 'RavenDB_2962' of https://github.com/ml054/ravendb

Conflicts:
	Raven.Studio.Html5/Index.html
RavenDB-3019 started working on periodic export validation
RavenDB-2993 Allow to define RavenFS as ecnrypted file systems in the studio
Fixing hashcode impl
Fixing NRE
Slightly better performance for comparison
Minor
RavenDB-3019 Validate values in the Periodic Export settings
RavenDB-3019 Validate values in the Periodic Export settings
Merge pull request #1699 from ml054/RavenDB_3019

Raven db 3019