add support for PostgreSQL

[DiogenesPolanco]

add support for PostgreSQL #11; 👍 It works but there are several scripts that are not compatible but I am working on scripts that are not compatible. ✌️

[CLAassistant]

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[jgauffin]

Thank you! If you don't mind I'll keep this as a PR until everything have been completed.

[jgauffin]

Feel free to push updates as soon as you got any, so I might be able to help you with the scripts that are left.