[Openid-specs-fapi] Issue #26: Error coding and API IDs should be added (Sascha) (openid/fapi)

[Nat Sakimura]

New issue 26: Error coding and API IDs should be added (Sascha)
https://bitbucket.org/openid/fapi/issues/26/error-coding-and-api-ids-should-be-added

Nat Sakimura:

Developers do not want to give errors to customers, but still needs to 
know what error has happened where so they prefer to 
use error code and API ID. 
This will helps debugging, especially on libraries.