dev branch: add a password resource for local email/password login

dev branch: prepare build scripts for a release

storage: increase the number of bytes randomly generated for IDs

dev branch: add a simple gRPC API

server: add a test for the health check handler

storage/sql: enable garbage collection

Was an oversite of the initial SQL PR.

Because these values are used for OAuth2 codes, refresh tokens,
etc, they shouldn't be guessable. Increase the number of random
bytes from 64 to 128.

cmd/dex: rename file

dev branch: add SQL storage implementation

This change adds support for SQLite3, and Postgres.

Currently, whether or not a user has authenticated themselves through
a connector is indicated by a pointer being nil or non-nil. Instead
add an explicit flag that marks this.

dev branch: add TODO file