fixed MD

docs/new_iso_image.md

-#How to add a new ISO image
+# How to add a new ISO image
 
 ISO images are required to create KVM virtual machines. They can be placed or downloaded at run time.
 
-##Placing your own ISO image
+## Placing your own ISO image
 
 Copy the .iso file to the KVM storage, it is /var/lib/libvirt/images by default. Make sure everybody can read it
 
@@ -11,18 +11,18 @@ Copy the .iso file to the KVM storage, it is /var/lib/libvirt/images by default.
 Get the md5 for the ISO file, you will need it for the next step:
 
     # md5sum file.iso
-    
+
 Add an entry to the SQL table:
 
     mysql> INSERT INTO iso_images (name, description, arch, xml, xml_volume, md5)
             VALUES ('name','the description', 'i386', 'name.xml' ,'name-vol.xml','bbblamd5sumjustgenerated');
-  
-##XML file
+
+## XML file
 
 A XML template file is required if you want to create machines from this ISO. In the directory etc/xml there are examples. You can make new ones creating a new machine from another tool like virt-manager. Once it is down dump the xml with
 
     # virsh dumpxml machine name.xml
 
-##XML Volume file
+## XML Volume file
 
 Create a new xml volume file based in another one from etc/xml.