Create Module loading system (PPM)

[dcbartlett]

This should have obey the following:

• should be a cli interface
• should have a help file
• should have a command to list all available modules
• should download module (prismarine-module-*) to prismarine_modules folder
• should be easy to use
• should have sexy colors on the console.

[dcbartlett]

See https://github.com/PrismarineJS/prismarine-cli/issues/1

[dcbartlett]

test