Implemented control + c functionality to stop running cmds such as hack() and analyze()

utils/StringHelperFunctions.js

@@ -17,4 +17,9 @@ function getIndicesOf(searchStr, str, caseSensitive) {
         startIndex = index + searchStrLen;
     }
     return indices;
+}
+
+//Replaces the character at an index with a new character
+String.prototype.replaceAt=function(index, character) {
+    return this.substr(0, index) + character + this.substr(index+character.length);
 }