GUI Tools Page Reborn

Long time PostgreSQL users will remember the “GUI Tools” page from the old techdocs. As part of the process of moving off the old system, I’ve now [ recreated the “GUI Tools” page] on the new techdocs system. Unfortunatly I don’t think I was able to use the most complete version of the page, so if someone feels ambitious please feel free to update it, after all the point of it is to be community driven documentation.