Summary: Added on_stack bit to flags.  Also MetadataMarkOnStack is used for more than JVMTI so had to be moved.
Reviewed-by: dholmes, stefank

Reviewed-by: coleenp

Summary: Move the handelization of 'last' to a point before the GC might enter.
Reviewed-by: dholmes, sspitsyn, coleenp

Summary: Add klass_holder() to return either mirror or class_loader depending on if the class is anonymous or not.
Reviewed-by: stefank, jrose

Reviewed-by: johnc, coleenp

Summary: Add ClassLoaderData object for each anonymous class with metaspaces to allocate in.
Reviewed-by: twisti, jrose, stefank

Summary: Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes
Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland
Contributed-by: Njmasa &lt;jon.masamitsu@oracle.com&gt;, stefank &lt;stefan.karlsson@oracle.com&gt;, mgerdin &lt;mikael.gerdin@oracle.com&gt;, never <tom.rodriguez@oracle.com>