[beast: 18/20] README.md: mention the 'npm' dependency, remove 'guile' dependency

[Tim Janik <timj src gnome org>]

commit 6dc8cb1df96569f68c86deef93b2e99867a151a7
Author: Tim Janik <timj gnu org>
Date:   Mon Jun 19 00:10:15 2017 +0200

    README.md: mention the 'npm' dependency, remove 'guile' dependency
    
    Signed-off-by: Tim Janik <timj gnu org>

 README.md |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/README.md b/README.md
index 949cae7..7cd2de3 100644
--- a/README.md
+++ b/README.md
@@ -32,7 +32,7 @@ For Linux kernels of the 2.6.x series and later, this enables the
 low-latency scheduling behavior needed to avoid audio artefacts.
 
 In order to build release tarballs, `Rapicorn`, `GnomeCanvas`,
-`Guile-1.8`, `Ogg/Vorbis` and `libflac` are required.
+`Ogg/Vorbis`, `libflac` and `npm` are required.
 Support for MP3 files is optional and requires `libmad` (MPEG audio
 decoder library) when compiling Beast.
 Compilation requires `g++-4.9` or later and a recent Linux