pfstools for HDR images

File Release Notes and Changelog

Release Name: 1.6.3

Notes:
This is a bug-fix release.

Changes:
	 * fixed: pfsinopenexr can now read files that has data window < display window
	 * fixed: pfs library can handle channel names up to 32 characters (was 8)
	 * updated: pfs specification - max string lengths and format of custom channel names
	 * security fix: fscanf in rgbeio.cpp (thanks to Stefan and Ludwig)
	 * bugfix: pfsview - segfault when switching channels
	 * fixed: pfsview - color readout in the status line refreshed when new channel or frame loaded
	 * added: matlab/pfs_write_luminance.m
	 * bugfix: rgbeio - header read properly when the first byte is 0x20 (thanks to Axel)
	 * bugfix: rgbeio - fix misinterpreted rle-compresses lines (thanks to Axel)