#160. Brought back in the features for taxonomy term reference field. Added a children array property that can be set on form element items to place additional render objects or markup with them.
#160. Changed drupalgap_jqm_page_event_fire() to convert the callback arguments into a single item array, if the arguments are not an array. Changed options_field_widget_form() to use markup:drupalgap_jqm_page_event_script_code() when placing taxonomy terms in a select list.
Fixing merge conflict.