Install failed about amazon-kinesis-agent

[mengzhuo]

build.xml

<?xml version="1.0"?>
<project basedir="." default="release" xmlns:unless="ant:unless">
    <property name="agent.name" value="aws-kinesis-agent" />
    <property name="agent.package.name" value="AWSKinesisStreamingDataAgent" />
    <property name="agent.version" value="1.0" />
    <property name="agent.vendor" value="Amazon.com, Inc." />

    <property name="src.root" location="." />
    <property name="src.dir" location="src" />
    <property name="build.root" location="ant_build" />
    <property name="build.private" location="${build.root}/private" />
    <property name="build.lib" location="${build.root}/lib" />
    <property name="build.dependencies" location="dependencies" />

    <path id="classpath">
        <fileset dir="/usr/share/java" includes="**/*.jar" />
        <fileset dir="${build.dependencies}" includes="**/*.jar" />
    </path>

    <target name="get-java-version">
      <condition property="current.java.version">
        <or>
          <equals arg1="${ant.java.version}" arg2="1.7"/>
          <equals arg1="${ant.java.version}" arg2="1.8"/>
        </or>
      </condition>
    </target>
    <target name="check-java-version" depends="get-java-version" unless="current.java.version">
        <fail message="Unsupported Java version: ${ant.java.version}. Make sure that the Java version is 1.7 or greater."/>                                                                                                        [13/49]
    </target>

    <target name="init">
        <mkdir dir="${build.root}" />
    </target>

    <target name="compile" depends="check-java-version, init">
        <mkdir dir="${build.private}" />
        <javac source="1.7" target="1.7" includeantruntime="false" classpathref="classpath" srcdir="${src.dir}" destdir="${build.private}" />
        <property name="src.agent.path" value="com/amazon/kinesis/streaming/agent" />
        <copy todir="${build.private}/${src.agent.path}" failonerror="true">
            <fileset dir="${src.dir}/${src.agent.path}" excludes="**/*.java" />
        </copy>
    </target>

    <target name="build" depends="compile">
        <mkdir dir="${build.lib}" />
        <jar jarfile="${build.lib}/${agent.package.name}-${agent.version}.jar" basedir="${build.private}">
          <manifest>
                <attribute name="Main-Class" value="com.amazon.kinesis.streaming.agent.Agent" />
            </manifest>
        </jar>
    </target>

    <target name="clean">
        <delete dir="${build.root}" />
    </target>

    <target name="release" depends="clean, compile, build" />

I think you guys might want to update your document about minimal Java version requirement.