readme and builder

# Step 1 (Java):

bazel build -c opt //tensorflow/java:tensorflow //tensorflow/java:libtensorflow_jni //tensorflow/java:pom

mvn install:install-file -Dfile=bazel-bin/tensorflow/java/libtensorflow.jar -DpomFile=bazel-bin/tensorflow/java/pom.xml

# Step 2 (JNI):

bazel build -c opt //tensorflow/tools/lib_package:libtensorflow_jni.tar.gz

rm -rf bazel-bin/tensorflow/tools/lib_package/maven

mkdir -p bazel-bin/tensorflow/tools/lib_package/maven/org/tensorflow/native/linux-x86_64

POM="

<project>

  <modelVersion>4.0.0</modelVersion>

  <description>Platform-dependent native code for the TensorFlow Java library. CUDA support depends on the local build.</description>

  <groupId>org.tensorflow</groupId>

  <artifactId>libtensorflow_jni_gpu</artifactId>

  <version>1.15.2</version>

  <packaging>jar</packaging>

  <build>

    <resources>

      <resource>

        <directory>.</directory>

          <excludes>

            <exclude>target/**</exclude>

          </excludes>

      </resource>

    </resources>

  </build>

</project>

"

echo $POM > bazel-bin/tensorflow/tools/lib_package/maven/pom.xml

tar -zxvf bazel-bin/tensorflow/tools/lib_package/libtensorflow_jni.tar.gz -C bazel-bin/tensorflow/tools/lib_package/maven/org/tensorflow/native/linux-x86_64

cd bazel-bin/tensorflow/tools/lib_package/maven

mvn package

mvn install

cd ../../../../..