OpenPandora port with GLES, Joystick, Toggle Crouch and ARM/Neon support

There are many "defined" variable to play with:

HAVE_GLES to activate GLES renderer
ARM and NEON for Arm and Neon specific code
CROUCH to activate "smart" Toggle Crouch
AUTO_AIM to activate aim assistance (usefull for Joystick play)
JOYSTICK to activate joystick support.
PANDORA for specific OpenPandora support