Do a release v1.0 (simple bridge)

• Improve plugging modules that are called by controllers (write a Behaviour)
• Handle giving a custom path for the API (using Config)
• Handle verifying server key (from Config) (write a Plug)
• Write a task to create a Matrix server App Service yaml
• Write an interface to PolyJuice using the application service params
• Write typespecs
• Write moduledocs and docs
• Create an hex.pm release
• Ask Ben from New Vector to advertise it on the Matrix Blog