README.md: Link to BUILDING.md

Addresses a concern expressed in #56 and #58.

diff --git a/README.md b/README.md
index 035022c3492504ca0fada5e43f5944b804df2256..ca8866e06c386dcfaa49a4e1cfc31cf2adadf21a 100755 (executable)
--- a/README.md
+++ b/README.md
@@ -30,6 +30,12 @@ libjpeg-turbo is covered by three compatible BSD-style open source licenses.
 Refer to [LICENSE.md](LICENSE.md) for a roll-up of license terms.
 
 
+Building libjpeg-turbo
+======================
+
+Refer to [BUILDING.md](BUILDING.md) for complete instructions.
+
+
 Using libjpeg-turbo
 ===================