The layerindexlib module is designed to permit programs to work directly
with layer index information.  (See layers.openembedded.org...)

The layerindexlib module includes a plugin interface that is used to extend
the basic functionality.  There are two primary plugins available: restapi
and cooker.

The restapi plugin works with a web based REST Api compatible with the
layerindex-web project, as well as the ability to store and retried a
the information for one or more files on the disk.

The cooker plugin works by reading the information from the current build
project and processing it as if it were a layer index.


TODO:

__init__.py:
Implement local on-disk caching (using the rest api store/load)
Implement layer index style query operations on a combined index

common.py:
Stop network access if BB_NO_NETWORK or allowed hosts is restricted

cooker.py:
Cooker - Implement recipe parsing