Adjust Popen object creation order to fix issue #30

Have to create pager Popen object before the translator Popen object
in PatchStreamForwarder, otherwise the `stdin=subprocess.PIPE` would cause
trouble to the translator pipe (select() never see EOF after input stream
ended), most likely python bug 12607 (http://bugs.python.org/issue12607)
which was fixed in python 2.7.3.