make suba meminfo counters equivalent to firmware counters
Add EngDrvRead stub & wrapper for precision synch.
http://chdk.setepontos.com/index.php?topic=8312.msg107419#msg107419
Fix for finsig_dryos.c reporting NEED_ENCODED_DISKBOOT on some cameras where it is not actually needed.
Fix gensigs_dryos.sh & gensigs_vxworks.sh to work on OS/X.
Add executable property on .sh files.
Add generated Lua files to 'ignore' list.