Overview

This PR is a complete re-write of the original Steam CMD JS Interface. It uses modern JS features, secure dependencies, and a better file structure.

This resolves #2 and resolves #3

Changes

Added a .editorconfig file to make editing files more consistent.
Added WebStorm's .idea folder. This makes editing the project in WebStorm more consistent.
Rewrote README
Moved all the source files to the src folder
Renamed files to match the name of the class that they contain.
Used async generators instead of streams
Disabled the ability to construct a new SteamCmd object via the new keyword. Instead the asynchronous init function must be called instead.
Made use of private instance fields
Broke up the single, monolithic file into multiple smaller files.
- Added a helper file that deals with archives
- Added a helper file that deals with Node Pty
- Added a custom SteamCmdError error class
Added a lot of documentation.
Added StandardJS as code linter and style guide
Removed Jasmine unit tests. They didn't work with the new code and I want to find a new testing framework.