update DIY banners README
add DIY banners requirements
change badge of forever DIY banner
Merge branch 'master' into phptour/banners
add new DIY banner "Pimp my App"
remove saveSvgAsPng.js
split banners sponsors/attendees
fix global offset DIY banners
add transparent background DIY banners
add Google Analytics DIY banners
fix missing xml declaration DIY banners
Merge pull request #35 from afup/phptour/banners

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