RFE: add 'atom'-feed output format

[Markus Korn]

Binary package hint: bughelper

It would be nice to have a feed-reader readable out-format like atom for bughelper/bugnumbers output.
If we then find a way to run tasks on bughelper-server frequently and not only once a user of bughelper-server could subscribe to a result-feed

Will start working on this, on a different branch.

Markus

[Markus Korn (thekorn)]

current state of the branch:
* task-files: each task can now have a 'lifetime' declaration, where lifetime could be either '@once', '@endless' or a date like '09 Oct 07 17:41'. '@endless' means that this task would be deleted after a bughelper-server run and '@once' (default) means the taskfile will be deleted after a run. If lifetime is a date, the taskfile will be deleted after the next run of bughelper-server after that given date.

* bugnumbers:
  markus@thekorn$ ./bugnumbers -p bughelper --format "atom" --file "bughelper.xml"
produces a xml file (atom feed) (see attachment)

* TODO:
  * add bugnumbers.comments() and bugnumbers.statistic() to bugHelper/format/atom.py
  * add an --atom cmd-line switch to bughelper-server, this would create a feed-reader readable index-file

Markus