Remove { url: dataURL } - directly output dataURL

If you log dataURL within object you can't directly open it in new browser tab/window. Also it's easier to copy the dataURL.
What do you think?
Bump jQuery to 2.x branch since we don't target IE legacy browsers
Merge branch 'patch-1' of https://github.com/Kienz/devtools-snippets
give better reporting when there is a permission error.  Issue #8