use latest models
Publish changes from TreeAgentSet to allow nw ext to update graph context
add a (passing) resize-world test

noticed while going over some code with Nicolas that we didn't have
test coverage on whether breed agentsets got cleared when the world
resizes
add comment to some unused code in ArrayAgentSet
fix #370 (Model runs: misaligned labels for plots on Mac)

in general, GUI stuff can end up with the wrong font size if you
don't call org.nlogo.awt.Fonts.adjustDefaultFont on everything.
so add it to PlotPanels.
use original widget as font source to fix #370

This avoids having to call org.nlogo.awt.Fonts.adjustDefaultFont
on the plot panel.
Merge pull request #390 from NetLogo/bug-370-fix

fix #370 (Model runs: misaligned labels for plots on Mac)
make new subpackages under src/test/../headless

it was getting too confusing having all of it just mixed together
minor cleanup
remove commented-out code
split a test off into its own file
further splitting up of test/..../headless.lang
disperse headless.misc.TestCompiler to the winds

relocate tests to lower packages or to headless.lang when
possible. some redundant tests eliminated.
cleanup in headless.lang.Parser
Removing age-old personal TODOs laying around
cleanup/refactor in headless.lang
further fiddling with headless.lang
Merge remote-tracking branch 'origin/headless' into tortoise
relocate test to right package
missing piece of sbt 0.12.4 upgrade