Updated Makefile to use 'setup.py --with-libyaml'.

Makefile

diff --git a/Makefile b/Makefile
index a0d4ebd..c62c979 100644
--- a/Makefile
+++ b/Makefile
@@ -9,19 +9,19 @@
 	${PYTHON} setup.py build ${PARAMETERS}
 
 buildext:
-	${PYTHON} setup_with_libyaml.py build ${PARAMETERS}
+	${PYTHON} setup.py --with-libyaml build ${PARAMETERS}
 
 force:
 	${PYTHON} setup.py build -f ${PARAMETERS}
 
 forceext:
-	${PYTHON} setup_with_libyaml.py build -f ${PARAMETERS}
+	${PYTHON} setup.py --with-libyaml build -f ${PARAMETERS}
 
 install: build
 	${PYTHON} setup.py install ${PARAMETERS}
 
 installext: buildext
-	${PYTHON} setup_with_libyaml.py install ${PARAMETERS}
+	${PYTHON} setup.py --with-libyaml install ${PARAMETERS}
 
 test: build
 	${PYTHON} tests/test_build.py ${TEST}
@@ -30,10 +30,10 @@
 	${PYTHON} tests/test_build_ext.py ${TEST}
 
 dist:
-	${PYTHON} setup.py sdist --formats=zip,gztar
+	${PYTHON} setup.py --with-libyaml sdist --formats=zip,gztar
 
 windist:
-	${PYTHON} setup.py bdist_wininst
+	${PYTHON} setup.py --with-libyaml bdist_wininst
 
 clean:
-	${PYTHON} setup.py clean -a
+	${PYTHON} setup.py --with-libyaml clean -a