[r-t] Definitions so far

[Mark Davies]

I'm in strong agreement with Ander. A method is a sequence of changes. 
Also, for the time being, we should stick within that space.

Dynamic methods or "processes", like Dixonoids, may be of interest later 
but shouldn't distract us from the current goal. Nor should an attempt 
to cover them weaken or make more complex the definition of the normal 
type of method.

MBD