clarify copyright/license on 3rd party code in src/spike_beans/base.py

[yarikoptic]

class dictproperty(object):
    """implements collection properties with dictionary-like access.
    Adapted from `Active State Recipe 440514:
    <http://code.activestate.com/recipes/440514-dictproperty-properties-for-dictionary-attributes/>`_
    """

is imho rather a copy of the code from there so please be nice and at least list original author/license (not sure yet how PSF would play with your BSD-2, probably making the whole project under PSF...)

[btel]

thanks. I just realised that it might be an issue. From what I understand PSF is compatible with BSD: http://en.wikipedia.org/wiki/Python_Software_Foundation_License

[yarikoptic]

yes -- it looks like compatible but probably the other way around, that BSD-2 is compatible with PSF since PSF seems to impose additional restrictions such as "Licensee hereby agrees to include in any such work a brief summary of the changes made to..." which are absent in BSD-2. Thus as a whole project would be under PSF license although your code under BSD-2. it is all cool imho, just need to list copyright/license for that piece ;-)