Bumping for 0.9.18 release

Bumping for 0.9.17 release

Updating version number

Bumping to 0.9.15

Updating for 0.9.14 release

Better deploy script to allow testing via a CI-provided DATABASE_URL

Updating version number

Updating changelog with recent features

Updating requirements.txt with new herokuapp release.

Updating herokuapp version in requirements.txt