Rename getObjectPropertyWidgetMapping() as getObjectUiValueNames().

 * return value is not a mapping but a list of names
 * object-ui-value matches the names of the methods where this is used (assignUiValues, assignObjectValues)
 * names is the name of the argument passed to these methods
Merge pull request #20 from gauthierm/object-property-widget-mapping-rename

Rename getObjectPropertyWidgetMapping() as getObjectUiValueNames()