/sign cancel subcommand cancels the player's pending right-mouse click action when "clicking" mode is in effect. (Fixes #5)
If the permissions system forbids the player from running a /sign command or subcommand, the player will see an error message instead of the plugin silently ignoring the command.
Fixed
When the player types an out-of-bounds line number in /sign set <line>, Bukkit no longer vomits the full plugin usage help.
Changed
The plugin's general messages to the player were in red, but now they're gold to distinguish them from error messages, which are still red.