Fixing links on the Welcome page
Fixing links on the Welcome page

The Welcome page of the user guide included links that no longer worked
as a result of the website redesign. Updated these links to match.
Driveby fix: Added “/MOJO” to the section that described POJOs.

h2oai/h2o-dev,jangorecki/h2o-3,mathemage/h2o-3,h2oai/h2o-3,h2oai/h2o-dev,spennihana/h2o-3,h2oai/h2o-3,spennihana/h2o-3,h2oai/h2o-3,michalkurka/h2o-3,spennihana/h2o-3,jangorecki/h2o-3,h2oai/h2o-3,michalkurka/h2o-3,h2oai/h2o-dev,michalkurka/h2o-3,h2oai/h2o-dev,mathemage/h2o-3,jangorecki/h2o-3,jangorecki/h2o-3,spennihana/h2o-3,mathemage/h2o-3,michalkurka/h2o-3,mathemage/h2o-3,h2oai/h2o-dev,jangorecki/h2o-3,mathemage/h2o-3,h2oai/h2o-3,mathemage/h2o-3,spennihana/h2o-3,michalkurka/h2o-3,h2oai/h2o-dev,h2oai/h2o-3,h2oai/h2o-3,jangorecki/h2o-3,spennihana/h2o-3,michalkurka/h2o-3,michalkurka/h2o-3,h2oai/h2o-3,jangorecki/h2o-3,mathemage/h2o-3,spennihana/h2o-3,h2oai/h2o-dev