Adding facilities to automatically generate mosaicked versions of cameras on the fly. To support this, changed the configuration system to load the camera config and camera format configs so that these remain in memory (replacing the filename with the psMetadata that results from reading the file). New mosaicked cameras have the names _CAMERA-CHIP and _CAMERA-FPA for an unmosaicked camera named CAMERA. These are placed at the top of the camera list, so that they are compared first against FITS headers. pmConfigCameraFormatFromHeader still outputs a warning if called on the header from a mosaicked camera, because the unmosaicked version also matches (the addition of a header, rather than changing a header means that something without that header in the RULE also matches).
