Update README.md. Fix references to Smarty3. Get rid of old changelog-like files.

libs/sysplugins/smarty_internal_compile_for.php

@@ -18,7 +18,7 @@ class Smarty_Internal_Compile_For extends Smarty_Internal_CompileBase
 {
     /**
      * Compiles code for the {for} tag
-     * Smarty 3 does implement two different syntax's:
+     * Smarty supports two different syntax's:
      * - {for $var in $array}
      * For looping over arrays or iterators
      * - {for $x=0; $x<$y; $x++}