Support .pyz and .pyzw "Python ZIP Application" files

[PEP 0441](https://www.python.org/dev/peps/pep-0441/) describes ZIP application files. For the easy case, of .pyz and .pyzw archives that contain source code (.py files), this should be as simple as adding the two extensions to `ZIPPABLES` in [ArchiveAnalyzer](https://github.com/jeremylong/DependencyCheck/blob/master/dependency-check-core/src/main/java/org/owasp/dependencycheck/analyzer/ArchiveAnalyzer.java).

For the more difficult case where .pyc and .pyo files are in the archive, it will be necessary to invoke a Python decompiler.