Add .LongInteger field to the Type object

Hello, this very minor tweak is related to issue: http://github.com/shivawu/topcoder-greed/issues/34

By allowing to use .LongInteger in conditions, We can detect 64 bits integers in the templates. I added this so I can make greed write "long" instead of "long long" in my c++ template. This will also allow the tester template to do some things different if needed in case the type is long.