fixes bug 912011 - colors in front page graph don't match headers below

@Kairo_at @ossreleasefeed @brandonsavage r?

Kairo, 
I don't want to bother you with the code changes. Instead if you can sign off on these two screenshots:
[home page](http://cl.ly/RHZb)
[daily report](http://cl.ly/RI3O)

What's note worthy is that the left-most color on both graphs now becomes the "highest" version (e.g. 26.0a1). That this now stays consistent across both reports. 

I changed the daily report so that the whole table below is reversed. The 23 version is the right now now instead. That's so that it follows the same pattern as the home page. 

Also, for both graphs I changed (added to home page, edited on daily report) the legend to be a single row across 4 columns for the legends. I think this looks better and prevents the legend from covering the graph lines.