add quick opal hack
center menu properly
add sercon (serial console) support
add proper mach_type support
fix gfx_draw_pattern_black
add androidboot.serialno support
update version to 0.3.7
do not put serialno as last cmdline arg

seems that placing serialno as last cmdline arg triggers a
parsing error on older TWRP version(s), so place it earlier
adjust menu centering for compatibility w/ themes

use older menu placement unless 10 or more entries
to maintain compatibility with moboot themes
update version to 0.3.8