* minor fix on LUT "auto bounds" initialization.
* re-enabled link user account button.
* better assignment of default image colormaps
* modified all the ArrayUtil.arrayToSafeArray(..) methods for better
type conversion.
* fixed IcyBufferedImageUtil.convertToType() method
* removed Plugin(PludingDescriptor) plugin constructor (too late)
* minor changes to the SequenceIdImporter interface (now implements
Closeable)
* fixed VTK 3D rendering with more than 4 channels.
* refactoring