RFR: implementation for JEP 334: JVM Constants API

[Vicente Romero]

Hi all,

Please review the proposed implementation for JEP 334 [1]. The webrev 
can be found at [2] and the javadoc at [3].

Thanks,
Vicente

[1] https://bugs.openjdk.java.net/browse/JDK-8203252
[2] 
http://cr.openjdk.java.net/~vromero/constant.api/webrev.07/constants.api.patch
[3] 
http://cr.openjdk.java.net/~vromero/constant.api/javadoc.07/overview-summary.html

PS. We are offering a MacBook Wheel to the authors of the first 5 
comments :)