PEP8 formatting
Allow user to pass apps_file path to Wappalyzer.latest()
Add analyze_with_categories() to return app categories with analysis
Embed apps.json data in package for speed / convenience
Switch apps.json path to resolve via pkg_resources
Bump version number, add package data, make test reqs more flexible
Remove register_url from test_latest since we no longer fetch apps.json URL, add simple test for analyze_with_categories()