Restructure contrib_bots bots to new layout.

In order to make the layout of all bots consistent, this commit
moves each bot into a folder with its name and modifies 'run.py'
so that only bots with such a structure can be executed. 'lib'
gets renamed to 'bots'.

contrib_bots/bots/encrypt_bot/EncryptBot/docs.md

@@ -0,0 +1,16 @@
+About EncryptBot:
+EncryptBot Allows for quick ROT13 encryption in the middle of a chat.
+
+What It Does:
+The bot encrypts any message sent to it on any stream it is subscribed to with ROT13.
+
+How It Works:
+The bot will Use ROT13(A -> N, B -> O... and vice-versa) in a python
+implementation to provide quick and easy encryption.
+
+How to Use:
+
+-Send the message you want to encrypt, add @encrypt to the beginning.
+-The Encrypted message will be sent back to the stream the original
+message was posted in to the topic <sender-email>'s encrypted text.
+-Messages can be decrypted by sending them to EncryptBot in the same way.