branch for release 2.0.2
import Travis config from master
import R setup script
Shut down train-test executor service (refs #360)
Add .gitignore [skip ci]
Move archetype tests to shell script for Travis (#362)
Remove bashism from archetype script
Clean up integration test POM
actually parse LensKit version
fix archetype versions for 2.0.2-SNAPSHOT
Merge branch 'release/2.0' into hotfix/2.0-zombie-thread
Merge pull request #361 from grouplens/hotfix/2.0-zombie-thread

Fix zombie thread in evaluator (closes #360)
Add documentation link to CSV data source (#364)
Document history summarizer as being non-null (#363)
Document user and item DAOs as returning null (#363)
Properly handle null profiles in item scorers (#363)
Merge pull request #365 from grouplens/hotfix/2.0.2-363-scorer-npe

Fix scorer NPEs (#365)
Update Travis build on release branch (#362)

This pulls in CI support from master to the release branch.
exclude LensKit artifacts from Travis pre-download (#362)
Only pre-install Maven plugins (#362)