Flattr badge and commit bump

Something went irky with my gh-pages repos recently so have
to repush a few of them.
Clean up SVG header output
Simplify `font-family`

`font-family: Arial, Helvetica, sans-serif` doesn’t make a lot of sense, as all systems that have Helvetica included have Arial too (i.e. Helvetica would never be used). By simply using `sans-serif`, Helvetica is used where available, with Arial as the fallback.
Consistently use lowercase for hex digits
Use <style>
Use original font-family stack

Have intentionally chosen Arial for these badges :)
update badges
update .gitignore
Update font-family
update badges
Update URLs to match new repo
Merge pull request #1 from badges/master

latest from upstream