+pl 76
+ - mudela version bumped to 0.1
+ - mudela-book
+ - doco updates, now some stuff in LaTeX
+ - junked book.{ly,tex} example
+ - progress indicator
+ - rhythm.ly updated
+ - removed mf sources from distribution due to (c) stuff
+ - allowal of breaks handled cleanly
+ - junked Subtle_reqs, junked Request_iterator. Request
+ iteration now by Voice_element_iterator
+ - Piano_bar, Piano_bar_engraver, Span_score_bar_engraver,
+ Span_score_bar
+ - Swallow_performer
+ - removed Staff_engravers, grouping into Line_group_engraver
+ - Head_column as base for Rest_column,Note_column
+ - Score_column derived from PCol
+ - regurgled Line spacing: interface and implementation
+ separate. Idealspacing moved into Spring_spacer
+ - Gourlay style linespacing
+