Review request for JDK-8013131: Various compatibility issues in String.prototype.split()

[Hannes Wallnoefer]

Please review my patch for JDK-8013131 - Various compatibility issues in 
String.prototype.split()

http://cr.openjdk.java.net/~hannesw/8013131/
This fixes the problems with String.prototype.split() from André's last 
email and a few other related problems such as lastIndex property being 
updated on non-global regexps and JSON treating regexp result as an 
Object instead of as an Array.

thanks,
Hannes