Add colors to log
Made color of console log optional, evenif module is absent, haraka will work seemlessly
Remove dependency from cli-color, now only dependent on util, no new dependency
print color only if it is console, else normal text
Remove dependency of cli-color from json.package file for colourization of logs
Remove amqp from package.json
Merge branch 'color' of https://github.com/samuelharden/Haraka into samuelharden-color
Implement my suggestions

Closes #566
Merge branch 'samuelharden-color'
Merge branch 'master' of github.com:baudehlo/Haraka