* improved matching of source images to sensors: matching can be specified in
the settings dialog. Sensor matching
based on ground sampling distance + number of bands + data type and optionally
wavelength and/or sensor name
* settings dialog shows known sensor / product specification and allows to
modify their default "sensor name"
* fixed copying of layer styles to maps of same sensor and map view type
* improved speed of mapping and layer buffering
* failed image sources are logged in the EO Time Series Viewer log panel
* Spectral Library Viewer better handles large collections of spectral profiles
