Modified parser to ignore reserved CVE-ID's.
If it is decided that reserved identifiers should be excluded from
the results, then this branch can be merged with master. Otherwise,
it can be deleted.
Included xxxx-yyyy component of each CVE-ID in output.txt.
By adding a keyword trigger for "cve", this will allow users to search
for "CVE-1999-1234" as well as "cve 1999-1234".