Support mrb_intern_cstr
Merge pull request #10 from matsumoto-r/support_mrb_intern_cstr

Support mrb_intern_cstr
Use mrb_module_get
Check buffer-overrun
Fix parsing invalid URL decode.
More shorten
Encode/Decode NUL byte
Encode NUL byte
Add file server
Map / to index.html
Don't write 500/404 when headers are written already
Fix keep-alive
Refactor
Refactor
Oops