* scm/documentation-generate.scm (string-append): add version.

	* scm/documentation-generate.scm (string-append): add version.

	* scm/define-markup-commands.scm (box): add box-padding and
	thickness props for the box command.

	* Documentation/user/changing-defaults.itely (Text encoding):
	elucidate use of \encoding for \header strings.

	* lily/parser.yy (lyric_element): use \encoding for lyrics strings.

	* lily/score.cc (LY_DEFINE): check if length of music > 0. Fixes:
	staff-change.ly