Add toys handler

It currently supports the !dice command without any parameters
Add parameters to !dice

It now supports specifying the number of sides of the dice and the
number of dice to throw.
Check for sane maximum values of !dice parameters
Add missing parameters to replyTo in toys
Merge branch 'toys-handler' of github.com:SweetieChry/Tims-Chatbot

Conflicts:
	package.json
Catch wrong input in toys handler