Merge pull request #53 from staticfloat/master

Rearrange downloads page with 0.2-rc1 on top
Harmonize windows 0.2-rc1 download links
Adds SVG version of the Julia logo
Update logo.svg
delete old blog post drafts; these are now getting linked to.
SVG logo: more accurate colors.
SVD logo: re-arrange and comment.
SVG logo: adjust the dots a bit.
use the SVG logo on the home page.