Reorganize schemas to be more generic

[astrobokonon]

I just added lig.weather.timo.virtualweatherstation as both a schema and example, but I realize that I should probably think about restructuring some of these to be more generic - that means have a lig.weather.virtualweatherstation base schema, and have an optional ".timo" postfix for the topic and probably an additional location/deployment tag in the XML to list the site too. It'd cut down on duplicates going forward, but there's no huge rush.

Tagging Mr. Freeze as a project too since it applies to cryogenic hardware especially, which is handled a bit differently already too.