update models library for CC Atmosphere changes
remove unused file

"sbt package" makes the manifest for the main jar.  at one time it
worked some other way, and this file seems to be left over from that
time.
fiddle with wording of Linux JDK warning in FAQ
rename no-longer-required bin/submodules.sh to bin/ssh-submodules.sh

and update the comments at the top to explain why
Merge remote-tracking branch 'origin/5.0.x'

Conflicts:
	docs/faq.html
Merge remote-tracking branch 'origin/master' into core

Conflicts:
	docs/faq.html
Merge remote-tracking branch 'origin/core' into headless