catkin: 0.6.3-0 in 'indigo/distribution.yaml' [bloom]

Increasing version of package(s) in repository `catkin` to `0.6.3-0`:

- distro file: `indigo/distribution.yaml`
- bloom version: `0.5.1`
- previous version for package: `0.6.2-0`

## catkin

```
* allow passing absolute INCLUDE_DIRS via catkin_package() into CMake config file in install space (#600 <https://github.com/ros/catkin/issues/600>, #601 <https://github.com/ros/catkin/issues/601>)
* improve error messages for wrong include dirs
```