Merge pull request #2 from craigspaeth/master

(@craig, cc @gib): preinstall instead
add qualified image url logic
remove compiled js
Merge pull request #3 from zamiang/qualified-image-url

@craigspaeth Add qualified image url logic
bump version
Merge pull request #4 from zamiang/qualified-image-url

@craigspaeth Bump version and add myself as a contributor
Defensive hasImage - don't assume image versions
Merge pull request #5 from gib/has-image

@dzucconi - Defensive defaultImageVersion no longer assumes image versions exist
defensive markdown