Conform to numpydoc

[letmaik]

This seems to output something that is close to numpydoc but not quite. To integrate with other tools it would be great if actual numpydoc output could be generated. In particular I'm refering to the parameters doc:

doxy2swig:

    Parameters
    ----------
    * `name` :
        the name of the thing

numpydoc:

    Parameters
    ----------
    name
        the name of the thing

It's important to omit the colon after the parameter name as this should only be given when a type is present as well (which doxy2swig doesn't support atm).