Part of the code assumed shortcodes were globally unique, and another part
assumed the shortcodes are unique per project (the latter is correct).
Now the project ID is taken from the URL the Subversion hook pushes to.
If revisions 1-130 exist, it errors at "svn log -r 1:250", so we can't
reliably give a last number. Easiest solution is to just forego per-batch
processing, and fetch all the unseen entries in one go.
It isn't triggered by anything yet. When the observer is called, it uses
Blinker to send out a signal for every [T12345] marker it sees in the
first line of each commit log. Those signals aren't connected to anything
yet.
NOTE: this requires the 'svn' Python module , which is a wrapper for the
'svn' commandline client. This client needs to be installed on our docker
when we deploy.
