Log Message:
Update py-elixir to 0.7.1.
(update dependency from py-amkCrypto to py-crypto).

0.7.1 - 2009-11-16

New features:
- Entities can now be declared "abstract" so that they do not create a \ 
table,
  etc... This allows, among others, an entity to inherit from multiple abstract
  classes (patch from Stephane Klein, closes #89).
- Added a new collection which can resolve entities relative to the current
  entity, for example "..other_module.Class" (based on patches from \ 
Johannes
  Janssen, closes #93).
- Added a new entity option "resolve_root", which allows one to specify the
  root module where your entities are defined. The string will be prepended
  to all "absolute" entity paths. It can also be used on a per-entity \ 
basis.
  This feature is based on a patch from Johannes Janssen, see #93.

Changes:
- using_options_defaults and using_table_options statements can be used several
  times within the same class (closes #70).

Bug fixes:
- Fixed custom base classes and versioned extension when used with zope
  interfaces (closes #98, patch from Valentin Lab)
- Fixed having relationships in custom base classes (based on patch
  by Stephane Klein)