now using a nesting template for cybox:Properties at Ivan's suggestion
moved the [external] message to where the "type" would normally go [there is no type if the referenced object could not be found]

do not display the type along with the constraints
object links in cybox:Properties (with the @object_reference attribute) are now hooked up like the related and associated objects

links follow the same formatting and use the same xsl template
removed yellow background on constraints

changed separator character to hollow circle instead of large diamond
removed unused templates now that the cybox:Properties element's children are being printed out via a generic template
added in change to show abbreviated version of raw content for ArtifactObj:Raw_Artifact if the content length is greater than 500 characters (can be easily changed).
now printing out the constraints (minus the object_reference link) and the object reference link separately.  the object reference link is printed in its own div after the arrow.

all the constraints are now printed out in one bracketed expression separated by a comma.