Add 'Report' as top-level object

[benjaminxscott]

As outlined in this proposal

• Add Report Object as clone of STIX_Package
• Create a new ReportIntentVocab-1.0 as a clone of PackageIntentVocab-1.0
• Rename fields in Report Object to better match report concept
• Deprecate fields in STIX_Package
• Add Reports to STIX_Package
• Deprecate Associated_Packages
• Update samples
• Add regression tests

[benjaminxscott]

add 'report' as a new object to take over some intents of 'package'

[rpiazza]

I would think you and @sbarnum would concentrate on this one

[johnwunder]

This will be implemented per https://github.com/STIXProject/schemas/wiki/Proposal%3A-Implement-Report-Object