- first version for replication ui (getting and saving to server)
- fix for creating new counter storage system document
finished counters replication ui
finished implementing counters add and update.
also added implementation of "get counter" functionality, but did not use it yet
Merge branch 'master' of https://github.com/grisha-kotler/ravendb

Conflicts:
	Raven.Database/Counters/Controllers/CountersController.cs