added random xkcd function using "*" as the param
Will get a random comic from http://dynamic.xkcd.com/random/comic/
Needs testing
fixed xkcd random and updated readme for link
Reverted file
updated xkcd random to use dbot api instead of function call.
Update modules/link/link.js

indent fix test
Update modules/link/link.js

Tab fix attempt 2
Update modules/link/link.js

Tab fix three: Revenge of the tabs
Merge branch 'master' of https://github.com/WelshMullet/depressionbot
Cleaned up code based on feedback.
Cleaned up link slightly.
Added check for params[1] to ~xkcd
Merge branch 'master' of https://github.com/WelshMullet/depressionbot
couple of formatting fixes + fix indentation [Close #258]