Left-strip leading periods in metrics/index.json.

Handles issues where WHISPER_DIR in config does not end
with a trailing slash.
Anal retentive 80-column formatting tweak.
PEP-8 is mother, PEP-8 is father, all hail PEP-8
Merge pull request #293 from bitprophet/0.9.x

Fix leading dots in metrics/index.json