Add Automatic-Module-Name

[tsmock]

This fixes #566, and is probably preferable to #620 .

[yagee-de]

I think com.drew.metadata fits better to the artifactId and the fact that this library also supports video and audio formats.

[tsmock]

I'm completely open to changing it to com.drew.metadata.

[tsmock]

Patch ping: Is there anything else I need to do?

[drewnoakes]

The issues here are my unfamiliarity with Java modules, concerns raised about minimum Java version requirements and the fact that our dependency xmp-core is not modular.

With this addition, can we still compile with Java 8 and target Java 6?

[tsmock]

Yes, you can still compile with Java 8 and target Java 6 with this patch. All this does is modify the META-INF/MANIFEST.MF like so:

Manifest-Version: 1.0
Implementation-Title: metadata-extractor
+Automatic-Module-Name: com.drew.metadata
Implementation-Version: 2.18.0
Build-Jdk-Spec: 1.8
Created-By: Maven Archiver 3.4.0
Main-Class: com.drew.imaging.ImageMetadataReader
Implementation-Vendor: Drew Noakes

Java 8 and lower don't use the Automatic-Module-Name property. Java 9+ can.

EDIT: To add on, the Automatic-Module-Name property is specifically for enabling the Java ecosystem to slowly migrate to the module system while waiting on dependencies to do the migration. This does not require xmp-core to have module information. Using module-info.java would require xmp-core to have module information for stability reasons.

[tsmock]

Patch ping: Is there anything else I need to do?

[drewnoakes]

Thanks for the change and explanation. This looks good to me and no one has expressed any concerns, so I'll merge this.