add new variable to cp_settings: vsite_subsite_inherit_theme #3226
add new function vsite_get_parent() to subsite.inc #3226
add function vsite_inherit to modify subsite on node insert #3226
check valid subsite before attempting to inherit #3226
Merge pull request #4148 from openscholar/3226-setting

new cp setting + vsite_node_insert() = inherit parent theme #3226