Merge pull request #183 from StoicLoofah/decode_upgrade_type_name

decoding upgrade_type_name so that it reads as a string not bytes in python 3

Author: GraylinKim

sc2reader/events/tracker.py

@@ -442,7 +442,7 @@ def __init__(self, frames, data, build):
         self.player = None
 
         #: The name of the upgrade
-        self.upgrade_type_name = data[1]
+        self.upgrade_type_name = data[1].decode('utf8')
 
         #: The number of times this upgrade as been researched
         self.count = data[2]