fixes modal javascript
Updates events to show all if no session ids are specified
Merge branch 'dev' of https://github.com/tdmedia/wp-mindbody-plugin into dev

Conflicts:
	inc/mz_events.php
	js/mz_mbo_modal.js
adds conditional display logic based on sessions being set
Merge branch 'dev' of https://github.com/tdmedia/wp-mindbody-plugin into dev

Conflicts:
	inc/mz_events.php
Moved // kill modal contents on hide inside of document.ready