Add an isint() function for consistency with isbytes() and istext()
Add an isint() function for consistency with isbytes() and istext()

michaelpacer/python-future,krischer/python-future,krischer/python-future,PythonCharmers/python-future,michaelpacer/python-future,PythonCharmers/python-future,QuLogic/python-future,QuLogic/python-future