Moving YAML version definitions into config.h.

Makefile

diff --git a/Makefile b/Makefile
index fb4ef6b..3b2980e 100644
--- a/Makefile
+++ b/Makefile
@@ -23,11 +23,6 @@
 	emitter.o\
 
 CGO_LDFLAGS+=-lm -lpthread
-CGO_CFLAGS+=\
-	-I$(PWD) \
-	-DYAML_VERSION_STRING='"0.1.3"' \
-	-DYAML_VERSION_MAJOR=0 \
-	-DYAML_VERSION_MINOR=1 \
-	-DYAML_VERSION_PATCH=3 \
+CGO_CFLAGS+=-I$(PWD) -DHAVE_CONFIG_H=1
 
 include $(GOROOT)/src/Make.pkg

config.h

diff --git a/config.h b/config.h
new file mode 100644
index 0000000..6a3d605
--- /dev/null
+++ b/config.h
@@ -0,0 +1,4 @@
+#define YAML_VERSION_STRING "0.1.3"
+#define YAML_VERSION_MAJOR 0
+#define YAML_VERSION_MINOR 1
+#define YAML_VERSION_PATCH 3