New empty_world version for groovy
Merge branch 'groovy_dev' of git://github.com/ipa-nhg/cob_environments into groovy_dev
removed incorrect launch file entry (cob_orge was removed in groovy)
removed ogre dependency
Merge branch 'groovy_dev' of git://github.com/ipa-raw3-1/cob_environments into groovy_dev