Version control tool for postgreSQL
There are two tools which regularly get &quot;honourable mentions&quot; in this category. They are:

http://www.liquibase.org/

and

https://flywaydb.org

They are specifically for database version control - Open Source, Apache licence.
I believe that it's good to go to the source (pardon the pun...) in these matters. A Google of &quot;database version control&quot; leads one to this post by Jeff Atwood (one of the founders of StackExchange). Be sure to follow the links to K. Scott Allen's series of articles. This is an excellent thread which pretty much sums matters up (i.e. version control your database (or its metadata!)).
You could also look at this by Martin Fowler which is a thought provoking article on database version control and software development generally.