- solidify/Makefile: added verbosity control (default is silent, enable
verbose output with V=1)
- solidify/Makefile: added "spotless" target
- solidify/Makefile (CFLAGS): moved warning options to CFLAGS_WARN
- solidify/Makefile: added dependency use and generation, with friendly
permission from fped/Makefile
- solidify/Makefile, solidify/histo.h, solidify/histo.c: generate a Z
histogram and find the median height
- solidify/face.c (read_face): set z_ref to the median, not the average
- solidify/face.c (read_face): uncompress .bz2 files on the fly
- solidify/face.c (read_face): don't close standard input (for style)