Fix lack-of-data-padding in sieste

Use strides to get interval-separation of data padding forward from end
and backward from start to fill in gaps in returned data
Merge pull request #22 from anchor/addr

Allow sieste address to be used as a unique identifier
Merge branch 'master' into oracledata
Merge pull request #25 from anchor/oracledata

Fix lack-of-data-padding in sieste