display BasicObject information in mirb

fix segmentation fault in BasicObject#inspect

Remove bit-fields. They doesn't reduce memory on major environments.

add mrbgem: mruby-array-ext

Add break to default case in switch statement

Improve Android platform support.

Define mrb_bool_t.

Cleanup symbol.c.

Clean up parse.y.

Remove compiler warning

It is safer than applying 1bit bit-fields to signed int.

For forward compatibility, you should substiture only 1 or 0 for the variable typed mrb_bool.

Add the type check in mrb_str_to_cstr().

Extract stack zero filling into new function.

DATA_TYPE must be set as soon as possible

mrb_sys_fail raises an instance of (subclass of) SystemCallError if we have it