[PinboardVisualization -> Docs] Add note about reTag Stream.Item option; remove private mark from the package
[Echo.StreamServer.API.Request] add support for "mux" endpoint
[PinboardVisualization] update note about reTag option
[Echo.StreamServer.API] replace API version after executing parent version
[Echo.StreamServer.API] update comment about using v2/mux endpoint
[Echo.Utils] introduce new static function which executes function which potential throws an exception safely;
[Echo.StreamServer.Controls.Stream.Item] wrap appending user content into "Echo.Utils.safelyExecute" call
[Echo.StreamServer.API] add test for the "mux" endpoint which respond with error request
[Echo.Tests] merge rc3.0.11 into neurostep/f1529-stream_invalid_html; update tests to new tests arch
[Echo.StreamServer.Controls.Stream.Item] fix misprint in the "_extraField" renderer
[Echo.Utils] update docs for the safelyExecute function; rename ctx -> context
Merge branch 'neurostep/f1521-pinboard_reTag_docs' into rc3.0.11
Merge branch 'neurostep/f1529-stream_invalid_html' into rc3.0.11