RFR: JDK-8131929: Add option for debuggable scopes

[Hannes Wallnoefer]

Please review JDK-8131929: Add option for debuggable scopes
http://cr.openjdk.java.net/~hannesw/8131929/

This contains a fair bit of cleanup (like putting most of 
Options.properties into lexicographical order). The actual change is 
pretty simple and consists of adding the --debug-scopes option and 
setting a flag in Parser.

Thanks,
Hannes