update website to reference 1.4 branch

Signed-off-by: Nico Schottelius <nico@kr.ethz.ch>

README

@@ -120,13 +120,14 @@ how to use cdist.
 There are at least the following branches available:
 
  * master: the development branch
- * 1.3: Support for local and remote code execution (current stable)
+ * 1.4: Support for redefiniton of objects (if equal)
 
 Old versions:
 
- * 1.0: First official release
- * 1.1: __file to __file, __directory, __link migration
+ * 1.3: Support for local and remote code execution (current stable)
  * 1.2: Dependencies supported
+ * 1.1: __file to __file, __directory, __link migration
+ * 1.0: First official release
 
 Other branches may be available for features or bugfixes, but they
 may vanish at any point. To select a specific branch use
@@ -156,6 +157,10 @@ If you stay on a version branche (i.e. 1.0, 1.1., ...), nothing should break.
 The master branch on the other hand is the development branch and may not be
 working, break your setup or eat the tree in your garden.
 
+### Upgrading from 1.3 to 1.4
+
+No incompatiblities.
+
 ### Upgrading from 1.2 to 1.3
 
 Rename **gencode** of every type to **gencode-remote**.