cmem memory modifications for full-res pools

This will support having two pools for 2592x1944 images from the camera.
These changes aren't needed for use with video, but they don't hurt
unless you really need the extra 44 MiB of RAM. Also just completely
remove the kernel argument checks in the gstti-init service so we don't
have to mess with that every time we mess with cmem.
Added patch disabling gst_v4l2_object_get_nearest_size

This patch should get rid of the "unexpected frame size of ..." when
using gstreamer with a 640x480 resolution video after using it with a
2592x1944 resolution image capture.

https://bugzilla.gnome.org/show_bug.cgi?id=649067
Added URLs to relavant documentation of applied patches