Add better version of the Axis logo
Update `CHANGELOG.md`
Add SVG version of the Phoenix/Firebird logo

Add SVG version of the Phoenix/Firebird logo and regenerate all the
different sized PNGs.
Add SVG version of the Netscape 9 logo

Add SVG version of the Netscape 9 logo and regenerate all the
different sized PNGs.
Update `CHANGELOG.md`
v3.1.0