Non-breaking cleanup of Sensor_Temperature library symbols

Cleanup of minor KLC violations that can be fixed without breaking existing designs.

Pin names were also adjusted to better match datasheets (mostly adding subscripts, fixing capitalization). A few broken datasheet links were also updated.

There are many old symbols (grandfathered in from older library versions) with hidden NC pins that are outside the symbol outline that could accidentally be connected to, and they should be moved/deleted, but that could break something (highly unlikely though).

There are some instances of ground pins that should be stacked, but that's another potentially breaking change so haven't made that change yet.

There's also a digital potentiometer in the library, DS1804 and a set of instrumentation amplifiers, AD949x that should probably be moved elsewhere.