improved Subaru HDS peak fitting

• Subaru HDS 1D spectra user-provided redshift: added support for inputting the source velocity [km/s]
• improved real-time peak tracking (fitting the width, location and rotation) in Subaru HDS 2D FITS spectra by using genetic algorithms (Differential Evolution), resulting in a better support for wide peaks (i.e. the Moon)
• lowered the display limit to 100 for the Subaru HDS spectral lines
• ensured API compatibility with the x265 C library version 4