* buildscripts/lilypond-profile.sh: error message if script is not

* buildscripts/lilypond-profile.sh: error message if script is not
sourced.

* lily/tuplet-bracket.cc (make_bracket): change edge-widen to
bracket-flare
(make_bracket): simplify code.

* lily/parser.yy (verbose_command_req): catch typos in \key scale
argument.

* python/lilylib.py (lilypond_version_check): new function

* scripts/lilypond-book.py (TexiPaper.incl_opt): idem

* scripts/ly2dvi.py (run_lilypond): add version check.

* scripts/lilypond-book.py (option_definitions): typo

* scripts/ly2dvi.py (include_path): typo

* Documentation/user/refman.itely: updates, fixes.