remove nulling out
Merge pull request #418 from NetLogo/issue-417

fixes #417
Merge pull request #426 from NetLogo/remove-nulling-out-in-agentsets

Remove nulling out in agentsets
add Windows RT to question about phones and tablets
document that HubNet applets are experimental and unsupported
upgrade to ScalaTest 2.0.M7

just on general principles, and to help test it
Merge pull request #433 from NetLogo/deprecate-hubnet-applet

document that HubNet applets are experimental and unsupported
make Climate Change use new-style plotting
document applet/ProGuard situation
nightly.sh: accept both --noclean and --no-clean

forgiving of faulty fingers and brains
upgrade to ScalaTest 2.0.M8
Merge commit 'c43bf77ff97eb8bbe7922238d0af583f1d600a47' into headless

Conflicts:
	src/main/org/nlogo/agent/ArrayAgentSet.java
	test/commands/DeadTurtles.txt
Merge remote-tracking branch 'origin/5.0.x' into headless

Conflicts:
	docs/applet.html
	docs/faq.html
	docs/hubnet.html
Merge branch 'headless' into tortoise
make tortoise.sh accept --no-clean, just like nightly.sh