Update models library
Updating documentation about applets

Java security updates, blah, blah

Blah.
update models submodule
Merge pull request #532 from NetLogo/recent-files-submenu

Add recent files submenu
small addition to dictionary entry for `self`
don't give false hope on the multiple-models-open thing
update checksums.txt

changes are to git versions only, not to checksums.
because of NetLogo/models#184c77a53f
location of a test file changed in models repo
slim down readme

the manifest section seems unnecessary to me, and it's better to
direct people to the Resources page online than to list resources here
use Markdown for readme
improve Markdown formatting of readme
improve Markdown formatting of readme
improve Markdown formatting of readme
minor readme tweaks
latest models

fixing a model that bin/release.sh was squawking about
bunch of FAQ tweaks
deprecate the applet in the User Manual
deprecate the applet in the GUI
deprecate the applet in the saved applet HTML pages
publish a test artifact too

partially addresses #561

note that for now the artifact contains only test classes, not any
test resources.  so this commit isn't as spiffy as the headless branch
equivalent in b24195a7911b90e18a3215dee42e09f9a5300310 and
214f94fddd83bf7184e3d2268058aa02f3e4990c.  it could always be further
improved later.