Refactored

Cleaned up If Statements and
-Check users guess and ensure it is a valid number before accepting it
and increasing guess counter. This entails checking if it is a number
between 1 and 100 and ensuring it isn't nothing or just spaces.
-Keep a user from continuing to guess after winning.
-Clear user previous guess from input for quick guessing.
-Allow user to press enter to submit a guess.
-Start a new game without page refresh.﻿