Fix MOAITimer.EVENT_STOP

The new MOAINode::EVENT_UPDATE (enum value 0) collided with
MOAIAction::EVENT_STOP (also enum value 0) in MOAITimer, which
is derived from both Node and Action. As a result, EVENT_STOP
was triggered every frame. Fixed by starting MOAIAction events
at MOAINode::TOTAL_EVENTS, similar to MOAITimer events starting
at MOAIAction::TOTAL_EVENTS.
Merge pull request #750 from theGoodEvil/fix_timer_event_stop

Fix MOAITimer.EVENT_STOP
Fix compilation of some iOS extensions

These extensions weren't updated when MOAILuaStateHandle
was renamed to MOAIScopedLuaState in changeset
39eba52567b652f9af7f962743d5fd8bee037ce9.
Merge pull request #754 from theGoodEvil/fix_ios_extensions

Fix Compilation of some iOS Extensions
Enable PVR support on iOS

MOAI_TEST_PVR was defined in a place where the actual PVR
code could not see it. Since it was just an alias for
MOAI_OS_IPHONE, I replaced it with that.
Fix PVR support by using zgl abstraction layer
Remove unnessecary casts
Merge pull request #755 from theGoodEvil/pvr_support

Fix PVR Texture Support
Optimized for the github README.
Improvement in the README.
Fix setClearColor with no arguments (to disable clear color)
Improvement in the README.
Merge pull request #764 from makotok/doc_improvement

Doc improvement
Fix CMAKE so luaext works
Revert to previous state
Revert some changes
Fix bad change.
Reset build script to original
Merge pull request #774 from jacobgardner/cmake-fix

Fix to allow LUAEXT to work on linux.