* Implement a sync strategy while waiting for XWiki to support configurations files located in the permanent directory by default

Add gradle wrapper

* Update documentation and provide an example compose file for postgres

* Use postgresql:9.5 since there's a problem with 9.6 (possibly an incompatibility with the driver version installed by libpostgresql-jdbc-java)

* Removed leftover

* Added posgtreql variants (not working yet)

* More progress, still not working. I have an issue with "jdbc:postgresql://replacecontainer:5432/replacedatabase" not working and generating " Caused by: java.net.UnknownHostException: xwiki-postgres-db"
* Added ascii art in Dockerfile
* Renamed containers so that we can run several xwiki images on the same machine without conflict

* Use a better name for the property (thanks to Tianon)

* Use a better name for the property (thanks to Tianon)

* More progress, still not working

* Prepare the field by generifying the templates/build and docker files

Add gradle to .gitignore

 XDOCKER-10: Cannot change database name
* Add leftover that was forgotten