Read a file on disk as a string.
Assumes file contents are encoded using utf8. This machine should **NEVER** be used in request handling code!
var Filesystem = require('machinepack-fs');
// Read a file on disk as a string.
Absolute path to the source file (if relative path is provided, will resolve path from current working directory)
An unexpected error occurred.
No file exists at the provided `source` path
'stuff in a file!'