Rtfscan - escape UTF and hexdec/utf

This works well with a lot of typical RTF. 
I didn't go through the trouble of escaping hexdec for non-ANSI/utf encoding
This still doesn't work with google docs created RTF scan: google docs clutters it's rtf with tons of control words before every set of characters - getting rid of all of them would require even more heroic regex acrobatics than the scan already performs.