- update to 0.6.8:
* Project hosting has moved to GitHub, under the SQLAlchemy
organization at https://github.com/sqlalchemy/dogpile.cache
* Fixed issue in the :meth:`.CacheRegion.get_or_create_multi` method which
was erroneously considering the cached value as the timestamp field if the
:meth:`.CacheRegion.invalidate` method had ben used, usually causing a
``TypeError`` to occur, or in less frequent cases an invalid result for
whether or not the cached value was invalid, leading to excessive caching
or regeneration. The issue was a regression caused by an implementation
issue in the pluggable invalidation feature added in :ticket:`38`.

- Remove superfluous devel dependency for noarch package