Compute proper JWT expiry date.

The current version produces an expiry_date which is:

now + token_expires + 1

This fixes it to use the already computed expiry date in token_expires.
Merge pull request #247 from calebcase/bug/fix-jwt-expiry-date

Compute proper JWT expiry date.
Removing comments from JSON file.
Adding coverage buckets to genomics.
1.0.5