Add support for pgweb in development

This changeset adds support for `pgweb` by installing the executable and
running it as a service. `pgweb` binds to `5433` within the VM and is
exposed to the Vagrant virtual machine host via `15433`.

Attempts to resolve #69.
Fix lint
Merge branch 'feature/hmc/pgweb' into develop
Merge pull request #87 from RickMohr/fix-lint

Fix lint
Create initial migrations for all apps with models