Stream

[Brian Goetz]

I've done a pass through the repo and marked almost all the classes 
package-private.  There are only a handful of public classes now.  I'm 
going to do a set of surveys that cover all the public methods of all 
the public classes.  This is the first one, and it's on Stream.  EG 
members will be receiving their surveys directly from SurveyMonkey.  If 
you don't get one within a few hours, let me know.

There are not really any questions; there is a free-response box for 
every method or group of related methods in Stream.

You are encouraged to write comments on:
  - the suitability of the method
  - the specific details of its arguments
  - generics nits
  - naming nits
  - semantic wonderings
  - anything else you might have to say

Writing nothing in the box will be interpreted as "I think this method 
is great as is."

Specifically, the Collector (reducer) API is still a work in progress, 
so there will be another opportunity to give final feedback on that (but 
feel free to give feedback here too.)