Support for Apache Maven

Since version 0.25.0, ABCL is also distributed through Maven Central, so that Maven users can get it easily integrated in their projects with no extra configuration.

This is a ​link to the ABCL POM: as you can see, it has no dependencies, and in order to use it in your Maven project, you just need to add

<dependency>
  <groupId>org.armedbear.lisp</groupId>
  <artifactId>abcl</artifactId>
  <version>0.25.0</version>
</dependency>

to the dependencies section of your project's POM.