Label non-parallel stages as such

[joezuntz]

Addresses issue #250 .

Also renames some classes which did not match their name attribute

[empEvil]

This is great. If I understand Ceci correctly it should now mean that if we try to nprocess =2 for this it should warn us or stop it? Also more importantly how do we ensure the lack of parallelization is reflected in documentation, rather than by guess?

[joezuntz]

It should complain if you try and run with nprocess=2, but yes, we should try and make the doc generator reflect it somehow. And maybe write a few notes in docstring about what good choices are.

[empEvil]

we shpuld leave up the issue, for the documentations side