Multiple config instances; dynamic parameters

[squaregoldfish]

These are two major new features that were added over the last year:

1. Multiple configurations are supported, differentiated by name. Supplying no name will use a default for backwards compatibility
2. Individual routines can have parameters passed to them instead of being defined in the configuration files

As discussed, it's likely that both SOCAT and QuinCe are diverging sufficiently that maintaining this common library is no longer viable. So I suggest these pull requests are left dormant unless we decide to keep things centralised.