Rhino 1.7R4 release

Set prototype and parent scope for JavaAdapters extending ScriptableO…

…bject.

Fixes for some obvious FindBugs-discovered inefficiencies

The pass that tries to put locals into java registers as doubles was …

…not functioning properly for values called as functions. Test case:

function f(tree, callback) {
 callback();
  f(tree, callback);
  }

Switch to __javaObject__ in the hope that it can be used more general…

…ly in the

future.

Import of HEAD before big E4X merge

Prepare for releasing 1.6R5

Changes for Rhino 1.6R4.

Fix for #343976

Bugfix for #321938: Credited patch author