have a more direct link to download and install (#529)
have a more direct link to download and install (#529)

* have a more direct link to download and install

like in 0.1

* reduce the diff

* nvm

* reduce diff

* typo galore

* add back the link to old docs

put it at the end of the page
follow up on #509

linsun/istio.github.io,linsun/istio.github.io,smawson/istio.github.io,geeknoid/istio.github.io,jasminejaksic/istio.github.io,geeknoid/istio.github.io,istio/istio.io,smawson/istio.github.io,jasminejaksic/istio.github.io,ZackButcher/istio.github.io,istio/istio.io,istio/istio.io,ZackButcher/istio.github.io,geeknoid/istio.github.io,linsun/istio.github.io,linsun/istio.github.io,istio/istio.io,istio/istio.io,geeknoid/istio.github.io,smawson/istio.github.io,linsun/istio.github.io,jasminejaksic/istio.github.io,ZackButcher/istio.github.io,ZackButcher/istio.github.io,smawson/istio.github.io,istio/istio.io,istio/istio.io,jasminejaksic/istio.github.io,geeknoid/istio.github.io