Prepare the code base for open sourcing

[BootBlock]

FileSieve has always been a closed system; because of this, the open sourcing of its codebase requires various changes. This task keeps track of those changes.

Goals

FileSieve.com

• Place a notice saying FS is becoming open source; link to this repo
• Tear down the site and allow the domain to expire

FileSieve

• Remove any licensing requirements
• Remove Account features
• Remove Exception Submission features
• Sanitise comments; make more professional
• Remove update checking; create a new issue (Add GitHub-based update checking #112) to reinstate via GitHub
• Redirect all links to this GitHub repo
• Figure out an appropriate license

BiQubic.Framework

• Remove any generic licensing features
• Remove BiQubic Account features
• Remove/Disable Exception Submission features
• Figure out how to link with the BQF repo

Documentation

• Place a notice saying FS is becoming open source; link to this repo
• Migrate over to GitHub (visually won't be as good, but allows me to kill off FileSieve.com)