Only attempt to derive jp2 copies from tiffs

Prevents embarasssing mistakes when you upload a JPEG as a master.
move to 1.1.63
Merge pull request #82 from nla/hr-derive-from-tiff-only

Only attempt to derive jp2 copies from tiffs
fix for == vs .equals
Update pom.xml
Update README.md
Merge pull request #83 from nla/hr-derive-from-tiff-only

fix for == vs .equals
Change to 1.1.65
adding co-master copy role to CopyRole enum.
adding co-master copy role to CopyRole enum.
Merge pull request #84 from nla/new-copy-role

adding co-master copy role to CopyRole enum.
added gmt date as a amber property data type.
updated amberdb version.
latest version is 1.1.66
Change digitalStatusDate to a date type, and also check for items missing subtype property.
merged the latest update from master branch.
Merge pull request #85 from nla/datatype-date

Datatype date
added copy type "d" for digital as an enum.
updated amberdb version.
added mets identifier for articles.