There were 48 total issues addressed, 7 of which are highlighted as important features.
We skipped directly to 10.3.1 as the 10.3.0 build had a regression that needed immediate attention.
Note that there is a new download page [1]. That is part of an overhaul of the old community sites [2]. Please give us feedback - which can be in the form of a pull request if you are comfortable with markdown :)
Thanks,
The Teiid Team