Update should.js to v4.3.0
Use SVG badges instead of PNG badges

SVG badges look beautiful on retina displays.
Update readme to include missing plugins 'remove desc'
Improve cleanupEnableBackground plugin.
Merge pull request #271 from YetiOr/yeti-or.no-filter-no-enable-b

Improve cleanupEnableBackground plugin.
Merge pull request #270 from SamHerbert/master

Update README to include missing plugins 'remove desc'
Merge pull request #269 from shinnn/master

Update should.js / Use SVG badges instead of PNG badges