add ability to associate processes with structures and symbols

[zippy]

Most structures need equality and ordering processes. most need transformation processes. Many symbols limit range of variability of a structure, e.g. shoe-size and lat, both structured as integers admit different "values".

[zippy]

A question: do we include the process definitions inside the structure/symbol definition, or do we refer to a process defined in the processes def list.

[zippy]

Now that we've implemented TRANSCODE, this becomes more important because it's necessary to implement generalized translation across structures/symbols.

[zippy]

8f16090726f31a1 adds basics for linking processes (operators/transcoders/validators) to symbols/structures/processes

[zippy]

Still missing, are implementation for doing this from base_defs

[zippy]

c52fc540e adds process linking to base_defs