Checks regedit privileges for IE11 compat. list

Woo version 2! I think this is a big milestone because I've now added registry checking, which will transition into version checking, which will then transition into not installing stuff that's already installed. 
I wanted to be able to check the registry without writing anything to the disk, but 10 tabs into Standard Output documentation, I gave up and decided to just write what I know and fix it later when I know more.

I've also added variables--just like a REAL programmer would. One of the variables isn't being used now (so I can come back later, delete it, and claim I've 'optimized the code').