Updating the Curate gem

2014-11-17: DLTP-285 Add descMetadata field for new field
(dc:creator:organization) and populate on work [Banurekha L]

2014-11-19: freezing mini_magick to 3.8.1 since 4.0.0 have some issues
[Banurekha L]

$ ./script/update-curate-gem