bumped version to 0.2.7 in package.json
Update ui.js

I saw a typo and it bothered me a lot.
Update README.md
Use an SVG badge.

An SVG badge looks better on Retina screens and when zoomed in.
removed double import, causes confusion
Update README.md
Update package.json

Added repository filed, as this is recommended and nice
fixed typo
Revert 7bc406d 'Update package.json'

This reverts commit 7bc406d because the repository field is already in there.