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
missing piece of sbt 0.12.4 upgrade
Revert "Publish changes from TreeAgentSet to allow nw ext to update graph context"

This reverts commit 523b89018fa16101dcce924e5afdf7a93e03f09f.

Will turn into a pull request instead.
Publish changes from TreeAgentSet to allow nw ext to update graph context
Merge remote-tracking branch 'origin/5.0.x'

Conflicts:
	src/main/org/nlogo/agent/ArrayAgentSet.java
publish SimpleChangeEvent on World3D resize
remove unused code in AgentSet classes

not just unused, but could be dangerous if used -- see comment removed
from ArrayAgentSet
add tests for published SimpleChangeEvent after world resize
add a Travis-CI config
disable Travis on 5.0.x
avoid overall comparison with old versions until we have comparables

Bureaucrats is currently the first model to run, but we don't have the
old benchmark data for it, so the script was trying to get a mean from
an empty list of comparisons and crashing on reduceLeft
only run until we have one good result for each model
don't attempt to build master on Travis
fix Travis oops?

hopefully
write benchmark results to tmp/bench.txt
fix Travis oops?

hopefully

Conflicts:
	.travis.yml
Merge branch '5.0.x' into benches-improvements