Add instructions for generating API docs

Signed-off-by: Glenn Oppegard <goppegard@pivotallabs.com>
Add user_provided_service_instances to document_api
Verify organization can see plan for instance

Previously, a user was able to create an instance of a private plan
under an organization that could not actually see that plan, so long as
the user belonged to some other organization that could.

[#51524041]
Validate space guid on service instance creation.

[#51524041]
Refactor service_plan_visibilities and service_instance api
Bump errors submodule

Needed a version that includes error ServiceInstanceOrganizationNotAuthorized
Fix service bindable flag migration for MySQL
User sees error when binding unbindable service

[Finishes #49522433]
Add tests for debug state changes
Delete model.png

no longer accurate
Delete ilia_tour

no longer accurate
Change user provided service label

[Finishes #53600459]
Return organization status in the organization summary endpoint
Allow developers to run CC from console (like rails c)
add Event object

[#49165165]
Encrypted app env variables [finishes #49240445]
Encryptor does not encrypt/decrypt nul values.
Migrate current env varibles to be encrypted.
Fixed broken migration for the environment_json encryption
moving the encryption migration to a later commit, app now deals with encrypted and unencrypted versions of env_json [#49240445]
bump errors