udpated logo and sprite

logo glow is now more precise around the edges
added indiedb icon to sprite.png and svg
Apply corrected Logo

Updated logo in sprite svg.
Changed padding to match bigger glow radius.
remove color coding

from menu, footer and sub pages
control version via yml header
correct source link
adjust and move infobox
added version to the download buttons

* added a triangle to sprite.png
* added old builds to the source button
update infobox

* add em element to text in braces
* add darker background
add missing news posts
replace version link with install help
change url in _config.yml