Build script changes to allow packaging and deployment to Maven central using maven-ant-tasks

Updated build.properties to contain the sonatype urls. Updated build.xml so that gpg signing works for each accompanying artifact type. Updated pom.xml to allow templated group and artifact ids.
Revert "build for maven"

This reverts commit e0a0baae0b4df7cb76c626e4479001fc973a454e. Resolved the conflicts on build.properties and build.xml to re-apply changes.
Use 1.4 version of gpg plugin for signing Maven upload.
Merge pull request #54 from lordnelson/master

Updated build script using maven-ant-tasks to push jar to Maven

New instructions to build a snapshot are 
set the maven.artifact.version
ant clean snapshot
ant clean release