Minecraft 1.8 Compatible Update

Still not Python 3 friendly on my branch, but I've seen delve make those changes and would invite a merge. MC changed some of their data schemas. I've updated how the region entities are scanned and parsed to make sure all entities are found and listed. Enjoy!

Some test data and sample output of entity data and coordinates:

------------------ Scanning the Overworld ------------------
"MaHorse" is at -128 64 197 (Ozelot).########################## ] ETA: 00:00:00
"MaDog" is at -119 69 155 (Sheep).
be5a809f-d2fb-4c3b-9e63-cfb9231012c6's "MaHorse" is at -126 64 198 (EntityHorse).
be5a809f-d2fb-4c3b-9e63-cfb9231012c6's "MaDog" is at -121 64 196 (Wolf).
be5a809f-d2fb-4c3b-9e63-cfb9231012c6's "" is at -121 64 200 (Wolf).
be5a809f-d2fb-4c3b-9e63-cfb9231012c6's "" is at -123 64 197 (EntityHorse).
"MaHorse" is at -125 64 199 (EntityHorse).

No username inports from reading the UUID yet, but I'd like to work that in unless someone beats me to it. Hit me with a pull request. :)