Update room nudge to indicate the name of the room, send nudge notification to all rooms (not just the active room)
Fix being able to get to negative unread notifications count.  Fixes #1031
add getting started to readme
Add other working content providers to readme
Make layout and display nicer for very low resolutions.  Associated niceties and structuring.
Remove just-added room overflow list pull changing for low widths
Fixed name matching regex for mentions

* Original name matching regex only replaced the first
  . character instead of all of them
make login screens behave more nicely at lower resolutions
fix typo in notification class
Fix readme.md to have content providers only present in master
Add SQL scaleout for signalr
Make sql server backplane changes suck less by using the nightly rather than release version
Improve margin, centering and make text smaller for "drop files here" overlay.  Add responsive style for even smaller text.  Fix top position on overlay when we have the collapsed-height version showing