Add options.terminology to override certain terms

[kvid]

A selection of terms can optionally be replaced by user defined terms, e.g. like this:

options:
  terminology:
    pin: way
    wire: core
    shield: screen

Resolves #331 basic feature

[kvid]

@amotl - Thank's for approving, but it still seems to be some unsettled issues at #331, so I marked this PR a draft until we agree on what to do.