Propose PackageManager to recognise Maven dependency XML in CBAN

[walterxie]

original CBAN XML, for example:

    <package name="BEASTLabs" version="2.1.0"
        url="https://github.com/BEAST2-Dev/BEASTLabs/releases/download/v2.1.0-beta1/BEASTLabs.v2.1.0.zip"
        projectURL="https://github.com/BEAST2-Dev/BEASTLabs"
        description="BEAST Labs utility library">
        <depends on="BEAST.base" atleast="2.8.0"/>
    </package>

proposed CBAN XML, check https://central.sonatype.com/artifact/io.github.beast2-dev/beast-labs/2.1.0-beta2 :

<package name="BEASTLabs">
    <groupId>io.github.beast2-dev</groupId>
    <artifactId>beast-labs</artifactId>
    <version>2.1.0-beta2</version>
</package>

It has all meta information in the pom.xml, but not sure if it is easy to write code to track the dependencies and download the jars ...