[report] Fix typo.
[parser] Skeleton of the parser abstract class.
[arachni] Add parser for 0.4.6 XML report.
[skipfish] Add parser for 2.10b JSON report.
[w3af] Add parser for 1.6.0.2 XML report.
[wapiti] Add parser for 2.3.0 XML report.
[report] Support new parsing architecture.
[tools] Support new parsing architecture.