NPC function: "say"

[nskins]

A nice convenience function for NPC would be #say(words), where words is a String. The function would do the following:

• Output the NPC's name followed by a colon & single whitespace,
• Output the argument words, and
• Use the type function from lib/goby/util.rb for output.

[jamesball27]

On it

[nskins]

Fixed in #114/#119.