* implement required retrieveItem function
 * allow json data for reference items to be set on the info object
 * allow for retrieving the keys of all "set" reference items for use in updating Items in the CSL engine
 * add tests verifying that the citationstyles core javascript resources are available.
 * add core citationstyles javascript sources to project to be served as resources
 * register viewlet for citeproc setup and bibliography rendering
 * register browserlayer
add browserlayer interface
setup template for the citeproc setup and bibliography rendering piece.
viewlet class for citeproc setup viewlet
browserlayer gs setup
 * note version of citeproc-js core javascript used in this version
 * add jesse to contributors list