Towards CRM-20037 edit template to be more flexible.

Towards CRM-20037 edit template to be more flexible.

This commit changes the way the Selector.tpl is structured to be 'driven' by the  array,
meaning that if people alter the order, or the array, their changes are more easily reflected in the tpl.

I've kind of ignored the soft credit fields but this does set a direction for setting them in
 and not having special handling in the tpl - ie. replace {if }
with columnHeader wrangling