Updated README.md to include 'Local Network Binding' development information.

Bleep bloop mobile testing. :clamshell_mobile_phone: 

See merge request !161

Document how to use Pry

Closes https://gitlab.com/gitlab-org/gitlab-development-kit/issues/140

See merge request !169

Add mysql link



See merge request !167

Docs on running MySQL

I didn't know where to place a link from the `README.md`, but decided one would fine it either way with grep etc.

See merge request !165

Log sidekiq arguments

Might be interesting for development.

See merge request !166

Fixes https://gitlab.com/gitlab-org/gitlab-development-kit/issues/136

Merge branch 'master' of https://gitlab.com/gitlab-org/gitlab-development-kit into influxdb-management

Fix link to post install after Vagrant setup since the Vagrant docs were split into /docs



See merge request !163

remove extra os x placeholder



See merge request !162

Also fix shasum command to actually detect failure.

Use NGINX for HTTPS development

Fixes https://gitlab.com/gitlab-org/gitlab-development-kit/issues/129

Stunnel is not enough for proper HTTPS development so I brought back our old NGINX configuration.

See merge request !158

Use 'exec' for clean stunnel shutdown

Closes https://gitlab.com/gitlab-org/gitlab-development-kit/issues/128

Missing 'exec' caused Foreman not to terminate stunnel when shutting down.

See merge request !157

Document how to enable Spring

Needs https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/4752

Closes https://gitlab.com/gitlab-org/gitlab-development-kit/issues/127

See merge request !156

Set up GDK with a gitlab-ce fork by default



See merge request !155