if we failed to connect, show the error message only once, for websockets
- if we failed to connect, show the error message only once.
- fix for unsupported browsers.
fix for server sending data with changes api every 5 seconds
Merge branch 'master' of https://github.com/ayende/ravendb into RavenDB-2480

Conflicts:
	Raven.Studio.Html5/App/common/changesApi.ts
	Raven.Studio.Html5/App/viewmodels/shell.ts
reconncet EventSource when connection drops
Fixed readme for optimized build
RavenDB-2424 On client side index creation we should be able to inspect if an index is going to be refreshed.
- if we failed to connect, show the error message only once.
- when succeeding to reconnect, reconnect to all the changes back.
- fix server "cooldown" time sending data
fixed documents page changes api
Merge branch 'master' of https://github.com/ayende/ravendb into RavenDB-2480
another fix to documents page
Merge branch 'master' of https://github.com/ayende/ravendb into RavenDB-2480
- fix for indexes canActivate
- documents page get changes api for bulk docs
scroll bar for documents page container
Merge branch 'master' of https://github.com/ayende/ravendb into RavenDB-2480
changed time to load changes api
Merge branch 'master' of https://github.com/ayende/ravendb
Fixed bug 2285
Merge branch 'master' of github.com:ayende/ravendb
Merge branch 'RavenDB-2480' of https://github.com/grisha-kotler/ravendb