Add sections in the README file about how to use GeoAPI

[desruisseaux]

The proposed addition is as below (Maven section):

Using Proj4j with GeoAPI

Proj4j-GeoAPI module provides wrappers for using Proj4J behind GeoAPI interfaces. GeoAPI is a set of Java interfaces derived from OGC/ISO standards for using different implementations of metadata and referencing services through a standard API. To include the module in a Maven project, add a dependency block like the following:

<properties>
    <proj4j.version>{latest version}</proj4j.version>
</properties>
<dependency>
    <groupId>org.locationtech.proj4j</groupId>
    <artifactId>proj4j-geoapi</artifactId>
    <version>${proj4j.version}</version>
</dependency>

where {latest version} refers to the version indicated by the badge above. Usage examples are available on the GeoAPI site.

[pomadchin]

Thank you! Looks good!

[desruisseaux]

Thanks. For information, I added Proj4J on the list of Known implementations.

[pomadchin]

Thanks Martin, that's awesome! Thank you for all of your contributions. 🚀