Merge pull request #889 from jkammerl/depthcloud

renaming depthcloudjs to depthcloud_encoder (release of this package has...
groovy-source: update nodelet_core branch
bump opencv2_doc
bugfix release for filters
Merge pull request #890 from vrabaud/master

bump opencv2_doc
Merge pull request #891 from jonbinney/filters_1_7_1

bugfix release for filters
rereleasing depthcloud_encoder