Project authors can override dependency snippet rendering

- For example, create _includes/pom.xml with the following content:

    <dependencies>
        <dependency>
            <groupId>{@= groupId @}</groupId>
            <artifactId>{@= artifactId @}</artifactId>
            <version>{@= version @}</version>
        </dependency>
    </dependencies>
    {@ if (repository) { @}
    <repositories>
        <repository>
            <id>{@= repository.id @}</id>
            <name>{@= repository.name @}</name>
            <url>{@= repository.url @}</url>
            <snapshots>
                <enabled>{@= repository.snapshotsEnabled @}</enabled>
            </snapshots>
        </repository>
    </repositories>{@ } @}

- For gradle, create _includes/build.gradle with the following content: