Refactored CveProcessor

[ctevse]

• Added tests
• Simplified code for determining whether or not a vuln exists in nvd/mitre/both
• Added new constructors for CveProcessor and CompositeVulnerabilitiy
• Fixed status bug

[aep7128]

I'm seeing CVEs color coded on my end while searching them. If you're getting the same results, then this looks good to me