Track files in more locations

[ferventcoder]

If a package installs to Program Files or unzips somewhere, choco should also track those files as part of the files it knows about.

This is related to #689, #681, and #691.

[ferventcoder]

• http://stackoverflow.com/a/17877338/18475 is required
• http://forum.sysinternals.com/finding-all-installed-programs-from-the-registry_topic21312.html