Include license information in docs

Description

In would be nice to briefly mention the licensing in the H2O-3 Docs so that anyone who searches for `license` can find this information.

Suggested page: http://docs.h2o.ai/h2o/latest-stable/h2o-docs/welcome.html
Licensing information: https://github.com/h2oai/h2o-3/blob/master/LICENSE

Fixed

Assignee

Zain Haq

Fix versions

None

Reporter

Michelle Tanco

Support ticket URL

None

Labels

Affected Spark version

None

Customer Request Type

None

Task progress

None

ReleaseNotesHidden

None

CustomerVisible

No

Components

Priority

Trivial