Corrected README.rst regarding Mac OS X autoconf install.

README.rst

@@ -203,27 +203,11 @@ We advice to install the following packages in the order as they appear below. W
         sudo python setup.py install
         cd ..
 
-*    Install libsharp and therefore autoconf, automake and libtool. 
-     Installations instructions for libsharp may be found here: 
+*    Install libsharp and therefore autoconf. 
+     Further install instructions for libsharp may be found here: 
      https://sourceforge.net/p/libsharp/code/ci/master/tree/::
                 
-        curl -OL http://ftpmirror.gnu.org/autoconf/autoconf-2.69.tar.gz
-        tar -xzf autoconf-2.69.tar.gz 
-        cd autoconf-2.69
-        ./configure && make && sudo make install
-        cd ..
-        
-        curl -OL http://ftpmirror.gnu.org/automake/automake-1.14.tar.gz
-        tar -xzf automake-1.14.tar.gz
-        cd automake-1.14
-        ./configure && make && sudo make install
-        cd ..
-        
-        curl -OL http://ftpmirror.gnu.org/libtool/libtool-2.4.2.tar.gz
-        tar -xzf libtool-2.4.2.tar.gz
-        cd libtool-2.4.2
-        ./configure && make && sudo make install
-        cd ..
+        sudo port install autoconf
         
         git clone http://git.code.sf.net/p/libsharp/code libsharp-code 
         cd libsharp-code