issue #2087: [dispatcher] Node::getEventPriority is a private method now.
issue #2087: [dispatcher] Updating some comments for new event dispatcher.
issue #2087: [dispatcher] New Dispatcher Test: Fixed priority.
issue #2087: [dispatcher] New Dispatcher Test: Fixed priority. Adding include.
issue #2087: [dispatcher] Changes event priority. The lower value is, the higher priority will be gotten.
issue #2087: [dispatcher]  Reverts: glGetError --> CHECK_GL_ERROR_DEBUG.
issue #2087: [dispatcher]  Enabled touch for Box2dTestBed, removed touch listener before re-adding.
issue #2087: [dispatcher] Rename FixedPriorityChangedTest to FixedPriorityTest.
issue #2087: [dispatcher] Fixing errors in test.
issue #2087: [dispatcher] Reverts: HelloCpp.
issue #2087: [dispatcher] Making Node::updateEventPriorityIndex to inline function.
issue #2087: [dispatcher] Fix of the listener of specified type is null.
Merge pull request #3614 from dumganhar/iss2087-new-event-dispatcher

issue #2087: [EventDispatcher] Comment fixes. Adding a new test. Event priority fix, the lower value, the higher priority.