Added rudimentary obfuscation

Rudimentary obfuscation has been added (gdcript only). It currently provides 'Level 2 Annoyance' (just functions and variables). You will likely need to work out a number of search/replacement issues for your specific projects and coding styles before it will work well. This implementation allowed me to obfuscate my latest project and I'm just sharing it as-is from that point. I have not tested it with any other projects (mine or others). At best, it could be a good starting point for meeting your needs. I'll continue to test/improve as time allows but looking to others to contribute if they see value.

I'm going to do another walk-through video to show/talk about the new feature in coming days. Expect it will go out within a week or so along with a whole other game dev series I'm dropping.