Updated model in sync with PAL local package.

- Separated a part of the launch in reemc_bringup.launch
- Added config dir on install
- cmfDamping -> implicitSpringDamper
- Removed collision groups (not supported).
- Updated copyrights.
- Updated some params slightly.
Merge pull request #4 from awesomebytes/sam_sync_pal

Updated model in sync with PAL local package.