JOL 0.3.1

[Aleksey Shipilev]

Hi,

JOL 0.3.1 is released and available at Maven Central (thanks to Evgeny
Mandrikov, as always!). This is a minor patch release.

Summary of changes:

 * Hotspot layout simulation missed the fact HS aligns the instance
field blocks by oopSize, which caused the discrepancies in the
simulation. This bug does not affect the use cases where we pull the
actual layout from the VM. Fixed:
   https://bugs.openjdk.java.net/browse/CODETOOLS-7901322

 * JOL CLI tool was exiting silently when mode was not specified. Made
it more user-friendly:
   https://bugs.openjdk.java.net/browse/CODETOOLS-7901323

 * A few touchups in the samples.

Enjoy!

Thanks,
-Aleksey.