Added new qml test and continue refactoring

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>