refactor and change option names of _simple and _yes
add input and message options
IO#syswrite should be faster than IO#write because it directly calls write(2)
It has became slower...

Revert "IO#syswrite should be faster than IO#write because it directly calls write(2)"

This reverts commit e1d0204b844655846913c35d357c784839c5028d.
0.2.0