changed and cleaned up readme file to reflect new project.
cleaned up html to adhere to w3c standards

added label around input element
closed button tag (previously incorrectly closed with closing div.
removed disabled prop from calc result input.
removed unnecessary extra var called in clearCommand().
added keypress reading on view.

added event listener for keypress in input
added focus on input at page init
prevented keypress in input from editing input val.
enabled sending keycode to model when keypressed.
wrote typedCommand function for handling keypress input.