RavenDB-2174: Some code refactoring around WebSocketsTransport
RavenDB-2174: some more code refactoring
Merge branch 'master' of https://github.com/ayende/ravendb into RavenDB-2174

Conflicts:
	Raven.Database/Server/AppBuilderExtensions.cs
RavenDB-2174: some code refactoring, started implementing new "watchTraffic" UI
RavenDB-2174: implemented watchTrafficConfig
RavenDB-2174: implemented basic watchTraffic
changed isActive class to 'pressed' and moved it to a common place in app.less
RavenDB-2174: Watch Traffic UI progress
RavenDB-2174: finished writing watchTraffic ui, before merging into the management view
preparing RequestManger for merge
RavenDB-2598 RavenDB failing test
attachment exports should be a 2-step process, first metadata should be downloaded, then for each attachment we should download data, not all at once
RavenDB-2590 Starting to implement server side conflict resolution for file systems (WIP- all tests green)
reintroduced IServerStartupTask
Better file names
Better log entries
Merge branch 'master' of https://github.com/ppekrol/ravendb
RavenDB-2501 custom functions must perform validation against jint mechanism before saving
Merge branch 'RavenDB_2501' of https://github.com/ml054/ravendb
Including stable / not stable in the CommonAssemblyInfo.cs