Metacat

Refactor the code to check a pid exists in the v1 api.

Modified the get method to handle the sid in the v2 api.

Change a method name to use pid rather than guid.

Add the code to get the most recent version of a sid which all pids are obsoleted.

Fixed a bug that the method getLocalId swallowed an exception incorrectly in the IdentifierManager.

Fixed a bug that some service failure exceptions were handled as the NotFound exception.

1. In the identifierExists method, the code to check if the identifier exist on the serial-id fields of the system metadata table.
2. Fixed a bug on the identifierExists - it considered an identifier didn't exist when the determining process threw an exception.

Add a method to check if a serial id exists.

Add a method to get the pid of the head version of a sid.

add Annotator Store implementation -- pass through to D1 API for the AnnotatorJS API