Fixes failed login/signup UJS requests
Fixes images with no votes showing up first on the home page
Adds featured image to front page
Fixes gif sizing on show page
Adds X button and escape key listener for getting out of light boxes
Makes X button bigger
Fixes X button z-index
Makes X button transparent
Fixes signup failure handling and fixes button disabling on submit
Adds featured image label to the top right corner
Merges with master