The main responsibilities of the packager are bundling dependencies, and creating the package.
A package is a json object with the following properties:
dependencies an object whose keys are names of dependencies within our context
and whose values are packages.
distribution an object whose keys are extensionless file paths and whose
values are executable code compiled from the source files that exist at those paths.
source an object whose keys are file paths and whose values are source code.
The source can be loaded and modified in an editor to recreate the compiled
package.
If the environment or dependecies contain all the tools required to build the
package then theoretically distribution may be omitted as it can be recreated
from source.
For a "production" distribution source may be omitted, but that will greatly
limit adaptability of packages.
The package specification is closely tied to the require method. This allows
us to use a simplified Node.js style require from the browser.