\header {
  %...
  tagline = "\\raisebox{16mm}{\\parbox{188mm}{\\quad\\small\\noindent \\hspace{\\stretch{1}} 
\\makebox[188mm][c]{Transcribed and typeset by " + \maintainer + " (" + \maintainerWeb + ") 
.} \\makebox[188mm][c]{Unrestricted modification and redistribution is permitted and 
encouraged---copy this music and share it!}}}"
}

lilypond --pdf WinterFlowerPolka.ly
GNU LilyPond 2.10.14
Processing `WinterFlowerPolka.ly'
Parsing...
Interpreting music... [8][16][24][32][33]
Preprocessing graphical objects...
programming error: FT_Get_Glyph_Name returns error
continuing, cross fingers
programming error: Glyph has no name, but font supports glyph naming.
Skipping glyph U+1000000A, file /usr/share/fonts/CenturySchL-Roma.otf
continuing, cross fingers
programming error: FT_Get_Glyph_Name returns error
continuing, cross fingers
programming error: Glyph has no name, but font supports glyph naming.
Skipping glyph U+1000000A, file /usr/share/fonts/CenturySchL-Roma.otf
continuing, cross fingers
programming error: FT_Get_Glyph_Name returns error
continuing, cross fingers
programming error: Glyph has no name, but font supports glyph naming.
Skipping glyph U+1000000A, file /usr/share/fonts/CenturySchL-Roma.otf
continuing, cross fingers
Layout output to `WinterFlowerPolka.ps'...
Converting to `WinterFlowerPolka.pdf'...