Update for Xojo (Realbasic) to allow 64 bit builds

[tempelmann]

[tempelmann]

Huh, I thought I had only done changes to Xojo files but now realize that it also contains updates for ARC and changes the min OS build from 10.5 to 10.10. That's not ideal and makes merging my changes somewhat difficult. I wonder if it's smarter to tag the current bdrister version, or even make a branch, to keep the 10.5 non-ARC version accessible while also updating the code to ARC. Still, it should not require 10.10 as it's now in my version.