Merge pull request #195 from zuzak/master

Update documentation

modules/dice/README.md

@@ -0,0 +1,9 @@
+## Dice
+Rolls virtual dice.
+
+### Description
+Rolls a virtual die and outputs the result to the channel.
+### Commands
+
+#### ~roll <die type>
+Rolls a die. 1d6 will be rolled by default.

modules/link/README.md

@@ -19,3 +19,5 @@ they are posted in the channel.
 If called with a link, the bot will attempt to find and return the title of that
 page. If called without a link, the bot will attempt the same on the last link
 which was posted in the current channel.
+#### ~ud [headword]
+Returns the first [Urban Dictionary](http://www.urbandictionary.com) definition for the headword provided.