Think about renaming user guides and reference manuals

[Ian Culverwell]

User Hui Liu, in Helpdesk enq 351, suggests renaming romsaf_ropp_ug_pp.pdf as romsaf_ropp_user_guide_pp.pdf, or (better) romsaf_ropp_pp_user_guide.pdf. And romsaf_ropp_pp_refman.pdf etc might be better than romsaf_ropp_pp_rm.pdf etc, too.

Should think about this, although there are implications for the makedistro script and the Makefiles, so it's not entirely trivial to do.