Added 6th possible stat. Reviewed a few stats.
Plus added these nifty calculators for lifesteal, crit and armor/magic resist - http://ds.bezumn.ru/stats-info/ Link is also available from main page.
A few descriptions are available at the bottom, if anyone has some text to contribute - feel free to post here. Only english and russian translation available now.
Yes, that's what the tool is aimed at - helping with the overwhelming runes info.
After you're a bit familiar, it becomes much less useful, maybe just to have another opinion on what you think is best
Keystones bonuses are random and don't depend on rune set anyway.
Listing everyone's best keystone would probably be nice, and listing best primary bonuses for major and minor runes too, but that's too debatable. I'll probably stick with what I have, so for keystone try getting stats from !@#$ super and great list.