Add topics to word-count exercise in config.json
Add topics to word-count exercise in config.json

addresses #353
mweb/python,behrtam/xpython,smalley/python,rootulp/xpython,N-Parsons/exercism-python,mweb/python,exercism/xpython,rootulp/xpython,behrtam/xpython,exercism/python,pheanex/xpython,jmluy/xpython,smalley/python,exercism/xpython,pheanex/xpython,N-Parsons/exercism-python,exercism/python,jmluy/xpython