jsk_recognition: 0.1.21-0 in 'groovy/distribution.yaml' [bloom]

Increasing version of package(s) in repository `jsk_recognition` to `0.1.21-0`:

- distro file: `groovy/distribution.yaml`
- bloom version: `0.5.9`
- previous version for package: `0.1.20-0`

## checkerboard_detector

- No changes

## imagesift

- No changes

## jsk_libfreenect2

- No changes

## jsk_pcl_ros

```
* Add utility methods for 2-D geometry
* Add new nodelet to filter bounding box array
* Check align axis before aligning boundingbox in ClusterPointIndicesDecomposer
* Add diagnostic information to EuclideanClusteringExtraction
* Add diagnostic information to MultiPlaneExtraction
* Add processing frame id information to PlaneRejector's diagnostic
* Add diagnostic information to ClusterPointIndicesDecomposer
* Add diagnostics to PlaneRejector
* Add more diagnostics to OrganizedMultiPlaneSegmentation and fix global
  hook for ConvexHull
* Contributors: Ryohei Ueda
```

## jsk_perception

```
* Add more diagnostics to OrganizedMultiPlaneSegmentation and fix global
  hook for ConvexHull
* Contributors: Ryohei Ueda
```

## jsk_recognition

- No changes

## resized_image_transport

- No changes