Structure change corrected

The old files in src/misc/RXTE and src/misc/MJDref_satellite.sl
were no longer included in the repository. Added them again according to the
new structure with the subfolder "satellites"

	new file:   src/misc/satellites/MJDref_satellite.sl
	new file:   src/misc/satellites/RXTE/RXTE_ASM_lightcurve.sl
	new file:   src/misc/satellites/RXTE/RXTE_PCA_info.sl
	new file:   src/misc/satellites/RXTE/RXTE_PCUs_from_filename
	new file:   src/misc/satellites/RXTE/RXTE_filter_file_info.sl
	new file:   src/misc/satellites/RXTE/RXTE_nr_PCUs_from_filename
	new file:   src/misc/satellites/RXTE/RXTE_obscat_info.sl
	new file:   src/misc/satellites/RXTE/RXTE_plot_PCA_info.sl
	new file:   src/misc/satellites/RXTE/bgsubHEXTElc.sl
	new file:   src/misc/satellites/RXTE/print_PCA_modes.sl
	new file:   src/misc/satellites/RXTE/readASM.sl