set version to 3.0.0.rc1
set descMetadata download extension to .txt; closes #1125
Parent or attached_to object pid now in hidden field in new object forms
Fixes #1127
Merge pull request #1147 from duke-libraries/1127-hidden-pid

Parent or attached_to object pid now in hidden field in new object forms
Merge pull request #1143 from duke-libraries/1125-rdf-download-extension

set descMetadata download extension to .txt; closes #1125
"sr-only" class applied to desc metadata form labels by script (fixes #1126)
Apply trackChangesHandler to "remove field value" buttons on desc metadata form (fixes #1129)
Merge pull request #1150 from duke-libraries/1126-new-title

"sr-only" class applied to desc metadata form labels by script (fixes #1...
Use model method `set_desc_metadata` to ensure that empty title does not get added
Fixes #1128
Merge pull request #1152 from duke-libraries/1128-attachment-no-title

Use model method `set_desc_metadata` to ensure that empty title does not...
Add permanent ID search options; closes #1155; closes #1156
Merge pull request #1157 from duke-libraries/permanent_id_search_fields

Add permanent ID search options; closes #1155; closes #1156
Use EXTERNAL_FILE_SUBPATH_PATTERN env var instead of initializer
Closes #1153
Merge pull request #1158 from duke-libraries/1153-external-file-subpath-pattern

Use EXTERNAL_FILE_SUBPATH_PATTERN env var instead of initializer
Bumnped version to 3.0.0.rc2
store minted id's and associated pid's in database; closes #1159
Merge pull request #1161 from duke-libraries/1159-record-noids

store minted id's and associated pid's in database; closes #1159
Indexing content ds control group (closes #1162)
Merge pull request #1163 from duke-libraries/1162-index-content-control-group

Indexing content ds control group (closes #1162)
Bumped version to 3.0.0.rc3
set version to 3.0.0