* lily/new-slur.cc (avoid_staff_line): new function: avoid

* lily/new-slur.cc (avoid_staff_line): new function: avoid
collisions with staff lines.

* lily/my-lily-parser.cc (LY_DEFINE): add directory of argument to
global_path

* lily/new-slur.cc (enumerate_attachments): move X of attachment
points for tilted slurs.

* lily/new-slur.cc: cleanup, split in functions.

* lily/new-slur.cc (score_encompass): variable head-distance penalty.

* lily/new-slur.cc (print): use debug-slur-quanting paper var.