Merge pull request #14 from PersistentSystemsLimitedSoftLayer/master

pull latest code
Merge pull request #15 from PersistentSystemsLimitedSoftLayer/master

pull latest code
Merge pull request #16 from PersistentSystemsLimitedSoftLayer/master

Added one generic method to execute GET Calls
Added get, list service for iscsi Network Storage
Merge pull request #70 from snehashahade/master

Added service for iSCSI networl Storage