Due to improvements in the recording scripts, most of the stuff the sanity
script was checking for is no longer needed (missing/corrupt video files
are handled by the processing scripts). The version of this script in
master has been cleaned up so that the only things it does are:

- Check that the events.xml exists and is properly formatted xml
- Rebuild flv files from red5 .flv.ser/.flv.info files

The script from master is compatible with the 2.0 code, so just use it
as-is.

This fixes a problem where following the recent red5 upgrade in 2.0 branch,
an flv file is never written for webcam streams where no frames were
received, despite there being recording events.

This improves the quality of portrait documents, before they were
1200px when landscape documents got 1600px.

Switching to scaling to a square means that we can use the "-scale-to"
option on pdftocaio, which means that it generates images directly
at the desired size. This can save quite a bit of time (and memory)
if a document was uploaded with extremely large page size.

There's some cases where you can get 0-duration recordings due to
recording event placement (e.g. a single recording event is the last
event in the events.xml). Detect these cases, and treat them like
no recording marks in the archive script (it will stop the recording
from being automatically processed).

I've also adjusted the sanity script to detect these cases and error
out. The recording processing scripts cannot handle 0-length recordings,
you have to manually edit the events. I've added a message to the
sanity log about this.

Change abs paths to use baseName config 

[HTML5 Client] Server-side timestamps in chat messages.

 - change log timestamp format so they are all the same

Rename function to be consistent with state name.

Hide connecting icon when screeshare is loaded.

Prevent whiteboard textarea flickering

Fix chat scroll bar and re-size handle overlap

Clear session storage to enter

Use Mac mic permission image everywhere, but Windows

Implement feedback screen

Fix label in output for bbb-conf --check

Added query of information from kurento to bbb-conf --check

 - change red5 screenshare log format

Cleanup video stream on reconnect

Pulled html5 locales May 11, 2018

Hide audio callout when button is clicked

RnP: Fix bitrate in screenshare.yml

I forgot to include the 'K' multiplier on the bitrate values, so they
were all 1000 times too low.