bump to latest dependency versions
bump to latest dependency versions

Specifically, dependency versions that work with a 1.6 JDK.

Note: later org.json:json versions only work with Java 1.8.

JDK 8:  <json.version>20141113</json.version>
        <json.version>20150729</json.version>

davidraleigh/geometry-api-java,Esri/geometry-api-java