atomstorage 0.1.2.1

This module defines a simple API for storing and retrieving Atom
entries in different storage backends. Entries are defined using a
JSON-like syntax::

>>> import datetime
>>> entry = {'id' : 'http://example.com/1',
... 'title' : 'My first entry',
... 'updated': datetime.datetime.utcnow(),
... }

The module comes with a shelve backend::

>>> from atomstorage import EntryManager
>>> em = EntryManager('shelve://file.db')
>>> em.create_entry(entry)
{'updated': datetime.datetime(2006, 8, 15, 16, 27, 7, 960677),
'id': 'http://example.com/1',
'title': 'My first entry'}

New backends can be easily added by creating a module and setting
an `atomstorage.backend` entry point. A SQLite backend is currently
being developed.

The API defines a few methods the entry manager should have. To
retrieve all entries, sorted by time (last to first)::

>>> entries = em.get_entries()

The last 10 entries::

>>> entries = em.get_entries(10)

Retrieve the entry with id "1"::

>>> entry = em.get_entry("1")

Delete the same entry::

>>> em.delete_entry("1")

Get all entries from August 2006::

>>> entries = em.get_entries_by_date(2006, 8)

Or from the "tech" category::

>>> entries = em.get_entries_by_category("tech")

To search for entries mentioning "Python"::

>>> entries = em.search("Python")

The API is by no means final. Comments, suggestions, patches and
critics are welcome.