Upgrade redis to 0.12.1

Requires updating the default params to the Redis constructor
Merge pull request #108 from stormpath/redis

Upgrade redis to 0.12.1
More descriptive 401 for fallback case
Merge pull request #111 from stormpath/api-auth-error-codes

More descriptive 401 for fallback case
Release 0.7.0 - update package.json, changelog
Merge pull request #112 from stormpath/release-0.7.0

Release 0.7.0