Correct is_video_recording() behavior for a810 and a1300
Set CAM_IS_VID_REC_WORKS for a1200, n, n_facebook, s100, sx50hs
define CAM_IS_VID_REC_WORKS for a720, ixus115_elph100hs, ixus125_elph110hs and sx220hs, based on test results from msl and fabri22 in http://chdk.setepontos.com/index.php?topic=9986.40
Add support for building CGDK with GCC 4.8.
http://chdk.setepontos.com/index.php?topic=12115.msg118870#msg118870
Set CAM_IS_VID_REC_WORKS for SX40.
Change option names for compatibility with CHDK-Shell (requested by msl):
http://chdk.setepontos.com/index.php?topic=12115.msg118941#msg118941
Set CAM_IS_VID_REC_WORKS for a495
sx160is: correct is_video_recording behavior, remove KEY_PRINT alias