add metrics to RavenDb
Merge branch 'New3' into RavenDB-1592
Adding metrics.dll custom dll to the shared libs
Midway through the work
remove PerformanceCouners usage. not finished yet
metrics cont ; check required
issue 1592 fix
missed files
Merge branch 'New3' of https://github.com/ayende/ravendb into RavenDB-1592

Conflicts:
	Raven.Database/Config/InMemoryRavenConfiguration.cs
Merge branch 'New3' of https://github.com/ayende/ravendb into RavenDB-1592
commit after pull
Merge branch 'RavenDB-1592' of https://github.com/ReginaBricker/ravendb into New3