* Add inital check for WinZip SFX archives
Every version of WinZip SFX has the string "WinZip Self-Extractor" in it,
* Add basic version detection
Versions 3+ and 2.x are identified radically differently, so make separate methods for them.
* Implement version 3+ detection
Should be very thorough detection, detects every 3+ file I have accurately.
* Cleanup code
General clanup
* Improve version 3+ detection
Use an XML string to determine the version.
* Harden against false positives
* Implement basic extraction
* Partial 2.X version detection
Very crude but effective 2.X detection for 2.0 versions
* Add version detection for 2.1 RC2 variants
* Add 2.1 version detection
* Add 2.2 version detection
Aside from clean-ups, this is the final functional addition
* Address comments