Translate and rewrite

This is wrong, I know. There are so many changes here that I lost count of them. It's almost a full rewrite.

1.- GatoScript, helper, antispam, protections, highlight, sysinfo and p2p modules have been translated and/or rewritten with all naming and comments in English.
2.- A lot of highlighting cases have been fixed or improved, and email highlighting has been added.
3.- Some protections have been improved to be faster (by removing unecesary double checks) and reordering the code.
4.- Database cleanup and removal of unused tables and fields.