invoking rule with argument
modified per hab's comment
update setNext
syntax modification
Add preliminary travis support.
Try py.test instead of trial; try 2.5.
Drop python 2.5; install parsley for running tests.
Oops; py.test takes filenames, not module names.
Swap coveralls implementations; add 2.6 compat.
It's spelled 'coveralls', not 'coveralls-python'.
Remove py.test dependency; restore python 2.6 support.
Retry trial for travis.
Post-merge fixes. All tests pass on 2.7 and 3.2.
Merged upstream changes. All tests pass on 2.7 and 3.2.
Added 3.3 to tests.
Merge remote-tracking branch 'upstream/master' into rule_argument
Merge pull request #37 from introom/rule_argument

invoking rule with argument
ISO 8601 parser for the examples
Make hash of equivalent terms the same
Merge pull request #43 from jml/hash

Make hash of equivalent terms the same