Ensure tools directory is created when running unit tests before doing anything else.
Initial Travis descriptor file.
Correct naming of ".travis.yml" file.
Remove "oraclejdk6" as JDK, no longer supported.
Merge remote-tracking branch 'origin/master' into travis-builds

Conflicts:
	build.xml
GLAZEDLISTS-419: Remove exception thrown when removing non-existent listener.
The old behavior can be restored by setting the system property: -Dglazedlists.compat.nonexistent_listener_check