[development] HTML / Plain text emails

[Moshe Weitzman]

> - There is a decent HTML to text converter in project module. If there 
> is a use for it in core I'd be happy to add it, but for now I'd like to 
> see it put in an .inc file which defines the necessary function(s) if 
> they haven't already. Then this .inc can be thrown in any contributed 
> module that needs it.

HTML to text is needed by any module that wants to send web content via 
email or SMS. i've seen custom code for this in notify, subscription, 
project, newsletter and organic groups modules ... moving this feature to 
core is best approach IMO