Refactoring of all helper functions to make it easier to
recognize them as such. All helper functions in global
shared scripts now follow the scheme __NAME__
Helper functions normally should not get called from outside.

Change-Id: I0d02028d3f9de1ad251af9226c0460655bd9c9bd
Reviewed-on: http://codereview.qt-project.org/5331


Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Bill King <bill.king@nokia.com>