added amber copy and file field mappings.
minor update.
expended on migration status checking and added mapping for copies.
added db qry to retrieve files.
added migration of fields in copy files and image files.
Update db.properties
added more migration details on files.
Merge branch 'mig-bk-md' of https://github.com/nla/dcmdb into mig-bk-md
updates to migration script.
refactored the code to separate the data mapping from the actual migration.
merged the db.properties from the master branch.
updated amberdb version.
added jp2 generation to dcm migration.
minor update.
Merge pull request #3 from nla/mig-bk-md

merged