remove jsdThreadState and jsdContext objects.
consolidate ExecutionHook and BreakpointHook callbacks
remove return value checking from all methods (xpconnect does this for us.)
validate integrity of jsdScript data to guard against calling into a destroyed script.
queue up script deletes that happen during the JS GC cycle, call them when GC finishes (bug 76979.)
don't NS_IF_ADDREF objects that we get using *::FromPtr()
add jsdScript::Invalidate()
add global service for the breakpoint callback
add breakpoint callback
move c callbacks to top of source
add creatorURL, creatorLine, constructorURL, constructorLine, and value attribut
es to jsdObject
move from pc as a ulong to pc as an object wrapped around a uword
move lineToPc and pcToLine from ThreadState to Script (where it belongs)
add setBreakpoint(), clearBreakpoint(), and clearAllBreakpoints() to jsdScript
relocate jsdService constructor from jsd_xpp.h in order to initialize the global
service
rename init() to on() on jsdService
add off(), clearAllBreakpoints(), and breakpointHook attribute to jsdService
add line attribute to jsdStackFrame
add pcToLine and lineToPc methods to jsdStackFrame
remove isFunction attribute from jsdValue (already covered by jsType attribute)
add propertyCount attribute to jsdValue so you can get the property cound without forcing a bunch of property wrappers to be created (as in GetProperties())
