parser.yy et al: Turn \transpose into a music function, make other music functions use ly:pitch? (issue 4991049)

[reinhold . kainhofer]

LGTM


http://codereview.appspot.com/4991049/diff/2001/ly/music-functions-init.ly
File ly/music-functions-init.ly (right):

http://codereview.appspot.com/4991049/diff/2001/ly/music-functions-init.ly#newcode852
ly/music-functions-init.ly:852: pitch)))
indent (or better, write the whole lambda in one line).

BTW, that's a nice catch that this function can be implemented so easy!

http://codereview.appspot.com/4991049/diff/2001/ly/music-functions-init.ly#newcode876
ly/music-functions-init.ly:876: (if     (string? finger) 'text 'digit)
remove tab in the middle of the line;
Use 8 spaces instead of tabs (even if the old code also had tabs. We
want to get away from tabs ASAP).

http://codereview.appspot.com/4991049/