Script mode support & Comment support

calculator.exe script
# script result ...

> 1 + 1 # plus
= 2

Computing progress optimized

1.1.1

bug fixed: param  missing error

Refactored

Refactored the whole program.

1.0.5

Error message optimized

1.0.3

tokenizing optimized & compute optimized

1.0.1

variable resolve bugs fixed