:fire: Remove transparent gif image
Use transparent png image to allow coloured backgrounds
Add two controls for deciding image background color
:lipstick:
:lipstick: Un-BEM'd
:lipstick: Un-BEM'd #2
Don't show controls when a JPG or JPEG image is open
:lipstick:
Merge pull request #21 from thomaslindstrom/feature/background-colors

Feature/background colors