ditz issue update
fixme comment cleanup
use shared helpers for seal/freeze and isSealed/isFrozen
duk_get_prop_stridx_boolean() helper and some refactoring, not yet sure if this helps
change back to unpacked argument: internal helper argument packing will be done separately and requires some asserts and such
Merge branch 'getprop-stridx-boolean'
update code footprint estimate, add lines-of-code estimate (excluding comments etc) computed with cloc perl utility
shared helper for String.prototype.charAt and String.prototype.charCodeAt; no reduction in native code size (in fact a slight increase), but charAt() might be slightly faster now