Add block autocad

- Add attribute to autocad block
- Add block library autocad
- Add attributes to block autocad
- Add object to block autocad
- Add wipeout to block autocad
- Add tag to block autocad
- Add block to palette autocad
- Add block to favorites autocad
- Add parameter to block autocad
- Add attribute existing block autocad
- Add grip to block autocad
- Add block tool palette autocad
- Add background mask to block autocad
- Add text attribute to block autocad
- Autocad add block reference