Various Search Fixes

- Adds search to main CLI help.
- Refactors lines to be < 80 characters long
- Changes search CLI to look like this: `sl search "search string"` instead
  of `sl search -s "search string"`
- Changes --type (or -t) to be a repeatable option instead of using a comma-separated
  list: `sl search -t cci -t ticket` instead of `sl search -t cci,ticket`