removed the newly added MATE information; updated my email.
removed most current stuff. not so current now.

I was encouraging a "roll your own" chromium launcher, so I figured the
whole idea was pointless, because people would have to research a bit
anyway. that's why I removed chromium-lkgr.

I won't be using google-chrome-unstable anymore, so I figured the whole
package could just go. that's why I removed google-chrome-unstable.