Bugfix for `semesters` shortcode parameter logic
Bugfix for `semesters` shortcode parameter logic

Completely mucked the logic on this. Past semester terms were not being dropped correctly from the array. In certain cases, depending on what terms were included in the parameter, infinite loops could occur. Doh.
gios-asu/ASU-RFI-WordPress-Plugin,gios-asu/ASU-RFI-WordPress-Plugin,gios-asu/ASU-RFI-WordPress-Plugin