update models
Merge branch 'headless' into tortoise
Adding ability to create a '.jar' full of Tortoise tests!

(cherry picked from commit 91d274b63eceae13c8706c17966a10fd665cb119)
build NetLogoHeadlessTests.jar as part of 'sbt all'

(cherry picked from commit 699ab23c759a456187981837d1d55df722be4f53)
respect CompilerFlags in more places

motivation: so Tortoise won't depend on ASM
Prepare headless for tortoise floatingpoint matching
use more concise 0.13 settings syntax
upgrade to ScalaTest 2.0 final
Merge branch 'headless' into headless-distance-match-tortoise
Merge pull request #505 from NetLogo/headless-distance-match-tortoise

Prepare headless for tortoise floatingpoint matching
rename LICENSE -> LICENSE.txt
models update: Giant Component
properly update checksum for Giant Component
default nightly.sh to not cleaning

having the default destroy stuff is too error-prone.
to explicitly request cleaning, pass --clean
Merge remote-tracking branch 'origin/5.0.x'
Merge remote-tracking branch 'origin/master' into core
Merge remote-tracking branch 'origin/core' into headless

Conflicts:
	test/checksums.txt
fix regression where checksum commands weren't working

forgot to update this before during headless package reorg
add 'ensime generate' to nightly.sh
update Travis config for change to nightly.sh