Added 5G Blacklist to .htaccess

The 5G Blacklist is a simple, flexible blacklist that checks all URI requests against a series of carefully constructed HTAccess directives. This happens quietly behind the scenes at the server level, saving resources for stuff like PHP and MySQL for all blocked requests.

Note: in some cases it may be necessary to place the QUERY STRING rules before WP-permalink rules.
Signed-off-by: Quinn Battersby <qbattersby@me.com>