Removed 3 character limit to inputs.
Added validation to only allow numeric values.
Modified style to do rtl input sort of like a regular calculator.
Delete and Backspace presses on the input field will both delete one character from the end.
Allowed Tab so that users can tab out of the field.
Cleaning up some leftover html blech.
Merge pull request #7 from Circle-of-Hackers/ExpandTheInputLimit

LGTM