Move to version 153
Merge pull request #173 from nla/bug/acm-v153

Move to version 153
Add getPropertyKeySet method on base model classes.
Update pom version
Merge pull request #174 from nla/feature/acm-propertySet

Add getPropertyKeySet method on base model classes, merged.
fix bug that was causing changes to Work ordering to fail
additional test for work ordering
minor update.
Merge pull request #176 from nla/sc-fix-edge-ordering

Sc fix edge ordering
reindexing continues
Merge branch 'master' of github.com:nla/amberdb into sc-dsc306-recover
code formatting fix
Move generic field into Node.
Merge branch 'master' into bug/acm-dsc-508
move to next version
Merge pull request #177 from nla/bug/acm-dsc-508

Promote generic fields.
added ref data required by tiff metadata extraction.
merged latest changes.
DSC-586 souldField lookup added
Add a method to findVertex (since people were using findWork to find copies).