Add additional WW commands.
Fix getcontactinfo handling.
Add prefix for errors and query all of them.

Prefix helps for telling (B)locking, (L)ocking and (S)ystem errors
apart.
Properly format record response.

Fix date format (use YYYY-MM-DD) and make response consistent if there's
no date.
Add 'rc setcontactinfo' command.
Fix getcontactinfo handling for RC30.
Add some additional HK commands.
Don't crash on invalid input.
Fix prefix for 0x13 response.
Consistentify commands.

- Use consistent day names (monday vs. MO)
- Consistently use lower case parameters and output
- Consistently use YYYY-MM-DD