Replaced a few TODOs by the variables they were refering to, updated the README

I noticed a few links documenting variables that were not being set by the userscript, so I just added them in. I have not extensively tested my modification, although it doesn't seem to have broken anything so far.
I think this is not the best way, as Firefox would still try to connect to localhost. Maybe setting it to blank would "disable" this, but I couldn't find any confirmation for this. Also, it might be, that setting the ```geo.enabled``` to false is already enough.