D-Net

added existHdfsPath method

allow to reuse existing regions when creating a table

implemented method to get HBase table split keys for all regions

added methods deleteHBaseColumn, deleteHBaseColumns

added methods describeHBaseColumn, describeHBaseColumns

added new rmi methods: deleteHdfsPath, createHdfsDirectory
added blackboard action: DELETE_HDFS_PATH

introduced batch delete blackboard action, allowing to consume an epr containing Rows to delete on an hbase table

added describeHbaseTable method, refined admin job submission, implemented copyJob, updated default lib name

added doc

added enum utils