Add section explaining conformance with Promises/A+ spec

[madarche]

Could deferred be listed in CommonJS promises article or is deferred missing some accepted "contracts" wrt to promises ?

[medikoo]

As far as I know this article is dead, and work is now continued in Promises/A+ repository, and they maintain list of conformant implementations.

Deferred is not listed there, as for a reason it doesn't adhere to one rule forced by a spec, it's forced next-tick resolution. See #6 for explained reasoning.

With release of v0.7 I plan to add section to documentation about conformance with Promises/A+ spec.

[madarche]

Thanks a lot for the clarification!

[medikoo]

I'll reopen it, with tweaked title. Indeed having clear statement about conformance with Promise/A+ is quite important. Most newcomers look in first place for this.