Download mod files with pws synq style instead of using normal rsync
Calculate file hashes to avoid redownloading existing valid files
Remove files no longer needed by mod
Limit number of concurrent downloads to number of cores on machine
Catch errors while downloading or writing file
Merge pull request #3 from Dahlgren/feature/synq

Use new synq format for downloading mod files
Removed no longer used require
Make sure mod is in packages available instead of old mods list.
Currently dependencies only seem to be available in the old mods list.
Fixed callback triggered incorrectly
Use Commander.js for cli commands
Updated README.
gunzip and rsync no longer needs to be separately installed.
Works on Windows now.
Release version 0.0.6