[API][Workbench] Security vulnerability on activejob

arv-put does not check cached signatures when resuming

[crunch2] include space required to download/unpack docker image in tmp disk request

is_a filter doesn't work with remote objects

[crunch-dispatch-slurm] Abandoned container starts again instead of being cancelled

[API] logs.event_at has wrong timestamp

[SDKs] support text-mode open() in Python 3

[CWL] Don't make any create/list API calls when preprocessed inputs turn out to be identical to original inputs

[crunch-dispatch-cloud] Merge incomplete implementation

Migrate public channel to gitter

Write configuring federation admin documentation