Merge pull request #1 from bluesuedesw/master

ADD: double tap gesture to zoom photo back out after being zoomed in
ADD: double tap gesture to return scaled image to center, tap gesture outside image to dismiss (via @arkuana)
Merge branch 'master' of https://github.com/u10int/URBMediaFocusViewController

Conflicts:
	URBMediaFocusViewController.m
ADD: parallax and blur effects to background (via @arkuana)
updating screenshot and docs for new effects