Use grampsweb.org instead of old github.io URL

Author: DavidMStraub

README.md

@@ -2,11 +2,11 @@
 
 RESTful web API for [Gramps](https://gramps-project.org).
 
-**Users of *Gramps Web*, please see the [Gramps Web documentation site](https://gramps-project.github.io/web/) for details on setup, usage, where to get help, and how to contribute.**
+**Users of *Gramps Web*, please see the [Gramps Web documentation site](https://www.grampsweb.org/) for details on setup, usage, where to get help, and how to contribute.**
 
 ## Description
 
-This project provides a RESTful web API to query and manipulate a [Gramps](https://gramps-project.org) family tree database. It can serve e.g. as backend for a web app. Gramps Web API is the backend powering [Gramps Web](https://gramps-project.github.io/web/).
+This project provides a RESTful web API to query and manipulate a [Gramps](https://gramps-project.org) family tree database. It can serve e.g. as backend for a web app. Gramps Web API is the backend powering [Gramps Web](https://www.grampsweb.org/).
 
 ## API documentation
 
@@ -18,7 +18,7 @@ The project is still under development, so API changes should be expected.
 
 ## Developer documentation
 
-The project's development documentation is hosted at https://gramps-project.github.io/web/dev-backend/.
+The project's development documentation is hosted at https://www.grampsweb.org/dev-backend/.
 
 ## Demo Server