added help module

src/modules/grass.rs

@@ -1,7 +1,9 @@
 use irc::proto::Message;
 use std::collections::VecDeque;
 
-pub const PATTERN: &str = "\\$grass (?P<nick>[^\\s]+)";
+pub const PATTERN: &str = "^\\$grass (?P<nick>[^\\s]+)";
+pub const NAME: &str = "grass";
+pub const USAGE: &str = "Usage: $grass <nick>\r\nThis tells the user identified by nick to touch grass";
 
 pub fn touch_grass(captures: regex::Captures, message: &Message, _: &VecDeque<Message>) -> String {