item authoring semi-functional

things left to do:
 - ability to remove options
 - maybe: ability to reorder options (options will probably be
randomized in the exam so this is unnecesary)
 - ability to add other option types (audio and image)
 - ability to add media
Merge branch 'master' of https://github.com/lorencs/Ualberta-Assessment-Tool-Prototype

Conflicts:
	php/examEditFuncs.php