*: move user API auth to middleware and fix return status

Move client authentication into its own middleware and provide
differentiation between HTTP requests that do not provide
credentials (401) and requests that authenticate as a non-admin
user (403).

Closes #152

travis: Change from after_success script to travis deploy

db: log ignored base64 decode error

*: allow dexctl set-connector-configs to read from stdin

Closes #276

Closes #270

*: upgrade to go 1.5.3

admin: add build ignore tag to tests that don't compile

These tests aren't included in the top level test script so have
unintentionally been ignored and currently don't compile. Until
this is fixed (see #257) add a build tag so tools ignore them.

pkg: improve base64 flag error message

*: update MAINTAINERS

Closes #258

Godeps,user: update uuid package reference

The package code.google.com/p/go-uuid/uuid has been moved to
github.com/pborman/uuid. Update the reference.

Closes #224

Documentation: dex roadmap

use cobra for dexctl cli logic

db, functional: make value column in key not pkey

go-oidc increased the size of the generated keys, which were too large
to be used as primary keys in postgres.

closes #220

:* run all functional tests through travis CI

server: better UX when remote ID already exists

Instead of cryptic message with nowhere to, give them the choice to
login with that account or register.

Update k8s README to --template syntax

server: fix flow when user logs in through wrong connector

This cleans up the code that deals with a user attempting to login
through a different connector than they registered with. The only
functional change is that `newLoginURLFromSession` is now called
with register = false when a user has an existing account.

cmd: reduce backoff max when worker is waiting for connectors

fixes #177

.travis.yml: Push to repo after success

*: use coreos postgres image for travis ci

Moved postgres image from personal account to quay.io/coreos.