add passing ExpressionParser test showing existence of issue #417

I'll fix the bug and update the test case in a subsequent commit
fix ExpressionParser bug -- fixes #417
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
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
3D dictionary fix: ox/y/zcor have double underscores
Updating docs regarding histogram auto scaling
Merge commit '122a67b4076eda198c88ed5a304f6e162d689abd'

Conflicts:
	headless/src/test/org/nlogo/parse/ExpressionParserTests.scala
Merge commit '935cf7b1f1da98be74e216d0877f7ffd4556eb97'

Conflicts:
	headless/src/main/org/nlogo/parse/ExpressionParser.scala
	src/main/org/nlogo/compiler/ConstantParser.scala
	src/test/org/nlogo/compiler/ConstantParserTests.scala
	test/benchdumps/CA1D.txt
	test/benchdumps/GasLabCirc.txt
	test/benchdumps/GasLabNew.txt
	test/benchdumps/Ising.txt
Merge commit 'db092347a2189757947f1ab899f19378103ca9ce'

Conflicts:
	src/main/org/nlogo/agent/ArrayAgentSet.java
Merge remote-tracking branch 'origin/5.0.x'

Conflicts:
	docs/applet.html
	docs/hubnet.html