RFR: 8025910 : (s) rename substream(long) -> skip and substream(long, long) -> slice

[Mike Duigou]

Hello all;

Based upon feedback from the JavaOne Hands-On-Lab and other sources the 335 EG 
has decided to rename the two substream methods in the Streams interfaces to 
skip and slice.

Webrev:

http://cr.openjdk.java.net/~mduigou/JDK-8025910/0/webrev/

and the specdiff:

http://cr.openjdk.java.net/~mduigou/JDK-8025910/0/specdiff/overview-summary.html

Thanks, 

Mike