Merge branch 'master' into lilypond/translation

Merge branch 'master' into lilypond/translation

* master: (79 commits)
  Convert dynamic marks (given in a <direction> tag, assigned to the staff at a given position in xml, not to a note like in lilypond)
  Don't crash when a score does not have an explicit key or clef set (e.g. Rosegarden produces such files).
  Also convert '0' in part ids to 'Zero', simplify that code a bit.
  Sorting of the parts in the .ly output. Currently, their order was not first staff, second staff, third, etc. but seemingly random
  Convert articulations like fermata, staccato, tenuto, tremolo (only single-note tremolo), accents, etc.
  Remove Info dir entries correctly in 'make install'
  Add a full stop in documentation.
  Sorting, formatting, adding punctuation, removing a double entry.
  Whitespace and punctuation issues.
  Add a space-to-barline property to allow looser spacing of clefs.
  Fix 392.
  Update de.po from Free Translation Project
  updated spanish working.itely
  updated spanish putting.itely file
  updated spanish tweaks.itely file
  updated soanish tutorial
  updated spanish lilypond.tely
  updated spanish basic notation
  updated spanish introduction
  updated spanish cheat sheet
  ...

Conflicts:

	Documentation/es/user/basic-notation.itely
	Documentation/es/user/lilypond.tely