closes #153 Instagram, Flickr link to original media

Also added option to make other images linkable by incluing "link" in the media json object
Captions and Credits now align to their media
Tweak animation styles to use mixin like new version of TimelineJS3
Fade in new slide backgrounds.

Also loading message won't sit on top of text
Closes #152

Click events are passed through to the map
Tweaks to youtube sizing and autohide chrome
Moved Menu to left side so it doesn't obstruct content
Added pinch zoom to map
latest codekit
Merge branch 'master' of https://github.com/NUKnightLab/StoryMapJS
Latest codekit
Removed extra console log for loading media