fix base64 dec testcase
ditz issue update
emscripten status
makefile tweaks
makefile: rename test -> ecmatest, make 'test' a multi-test target, add an emscripten test placeholder
move duk_size_t to duktape.h (needed by API), add '_t' suffixes to duk_int and duk_ret
duk_ret and duk_idx rename fixes
typing cleanup
-Wextra fix
guide update on regexp and inner function limitations
guide compatibility update (e.g. emscripten)
compile warning trivia