#4991 Add installing optional URW++ fonts

[Masamichi Hosoda]

Add installing optional URW++ fonts

LilyPond default fonts (TeX Gyre) do not have Greek and Cyrillic glyphs.
Newest URW 35 fonts (June 2016) have them.
http://git.ghostscript.com/?p=urw-core35-fonts.git;a=commit;h=79bcdfb34fbce12b592cce389fa7a19da6b5b018

This commit realizes the followings.

. configure script finds the following 12 OTF files.
. If they are found, make install installs them.
(Both TeX Gyre and URW fons are installed
under the lilypond fonts directory.)
. Even if they are not found, configure script does not raise error.
(Only TeX Gyre fonts are installed.)

C059-BdIta.otf
C059-Bold.otf
C059-Italic.otf
C059-Roman.otf

NimbusMonoPS-Bold.otf
NimbusMonoPS-BoldItalic.otf
NimbusMonoPS-Italic.otf
NimbusMonoPS-Regular.otf

NimbusSans-Bold.otf
NimbusSans-BoldOblique.otf
NimbusSans-Oblique.otf
NimbusSans-Regular.otf

http://codereview.appspot.com/315850043

[Anonymous]

Passes patchy tests - make, make check and a full make doc.

[Anonymous]

Patch on countdown for November 6th

[Anonymous]

I have some comments in Rietveld, so I'd like to keep this on one more round of countdown (or at least hold of pushing today), so provisionally: Patch on countdown for Nov 9th.

[Anonymous]

Patch counted down - please push.

N.B. I do have some other doc related questions on Rietveld still, but this should not stop the patch being pushed I think.

[Masamichi Hosoda]

I've pushed Patch Set 1 to staging.
commit 855e8e36a0c75aa75076fabe19aa292a6902ec96