(1) Hitachi SH material (sanitizable)

(1) Hitachi SH material (sanitizable)
(2) remove smallbook/cropmarks comments; switching to smallbook is now
    automatic w/house style
(3) use `|' alternative convention for SPARC dependent options.
    UnGNUish, but the convention is used for other machines in this book.
(4) cease eliding paragraph about purpose of assembler in Hitachi configuration
(5) use SPECIAL-SYMS switch more consistently
(6) formatting improvements from Q1 release
(7) use explicit @page instead of @group in long examples listing
instruction-set summaries (because some new texinfo bug leads to
double-spacing with @group in this context)
(8) rearrange H8/500 instruction-set summary into two cols
(9) include GPL from texinfo directory rather than duplicating here