Cleanup handling of title command.

Moves magic number to the top of file.
Reports the length limit back to the user.
Cleaned up !s, !suggest command match so it doesn't accidentally match !something else.
Trim whitespace from suggestions (start/end, whitespace runs).
Fixes some jslint warnings.
Merge pull request #15 from bradchoate/title-cleanup

Cleanup handling of suggest command.