Resolve "Compare API"

See merge request !6

REST access for corrupt collections + files

Closes #32

See merge request !5

Rest stackoverflow

This fixes a stackoverflow which was occurring when displaying json for Collections which also had connected PeerCollections. 

It also folds in updates for jackson and jersey.

See merge request !4

Merge OOM in AuditThread

Merge request for #28

See merge request !2

# Conflicts:
#   ace-am/src/main/java/edu/umiacs/ace/monitor/register/IngestThread.java