Method signature output format enhancement

[rtholmes]

Original report by rtholmes (Bitbucket: rtholmes, GitHub: rtholmes).

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The output format should be modified to record whether an outbound type is from a parameter, the return type, or from in the body. For parameters, the order of the param should be recorded.

This can be done by just adding a source='param/return/body' attribute and for parameters adding position='n'.

[rtholmes]

Original comment by rtholmes (Bitbucket: rtholmes, GitHub: rtholmes).

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I'm going to take the first stab at this one; if the extraction code needs to be modified I'll file another issue for that.