It now uses a plugin registry. Plugins are loaded when the configuration
file is first parsed. When a request is made it is passed over to the
available modifiers before and after it's execution and applies
whichever changes are made. It now passes a copy instead of a reference
to provide a nicer interface.
Dynamic values have been added as a plugin type. These plugins are
javascript functions that can be called from within the beau file and
whose results are used as a replacement.
These are added along with variables to the runtime execution flow. The
current order for their execution is:
Request composition -> Dynamic Values -> Pre-Request Modifiers ->
Post-Request Modifiers.
This introduces a top level key: `hosts`. It's an array where you can
configure multiple hosts with their own requests, they share defaults
and environment with the global scope.
This allows you to have multiple paths being the same with different
endpoints and settings.
David Diaz