* lily/stencil-scheme.cc (LY_DEFINE): ly:stencil-in-color

* lily/stencil-scheme.cc (LY_DEFINE): ly:stencil-in-color

* ps/music-drawing-routines.ps:

* scm/output-ps.scm: remove draw ez_ball.

* ly/engraver-init.ly (AncientRemoveEmptyStaffContext): remove
EasyNotation context definition.

* lily/easy-notation.cc (brew_ez_stencil): new file. Use
Text_interface and color for making easy note heads.

* lily/stencil.cc (with_color): new function.

* ps/music-drawing-routines.ps: remove draw_zigzag_line

* lily/line-spanner.cc (zigzag_stencil): rewrite to use draw-line
output routine. Zigzag now works in SVG too.

* scm/output-tex.scm (filledbox): idem.

* scm/output-svg.scm (filledbox): idem.

* scm/output-ps.scm (lily-def): remove horizontal-line.

* lily/lookup.cc (horizontal_line): use draw-line.

* lily/system-start-delimiter.cc: remove old staff bracket code.

* lily/system-start-delimiter.cc (staff_bracket): use glyphs.