Properties: Added missing values for touch-action

Added missing value for the `touch-action` property. Reference: [1](https://developer.mozilla.org/en-US/docs/Web/CSS/touch-action) [2](https://msdn.microsoft.com/en-gb/library/windows/apps/hh767313.aspx)

Author: AurelioDeRosa

src/css/Properties.js

@@ -506,8 +506,8 @@ var Properties = {
     "text-transform"                : "capitalize | uppercase | lowercase | none | inherit",
     "text-wrap"                     : "normal | none | avoid",
     "top"                           : "<margin-width> | inherit",
-    "-ms-touch-action"              : "auto | none | pan-x | pan-y",
-    "touch-action"                  : "auto | none | pan-x | pan-y",
+    "-ms-touch-action"              : "auto | none | pan-x | pan-y | pan-left | pan-right | pan-up | pan-down | manipulation",
+    "touch-action"                  : "auto | none | pan-x | pan-y | pan-left | pan-right | pan-up | pan-down | manipulation",
     "transform"                     : 1,
     "transform-origin"              : 1,
     "transform-style"               : 1,

tests/css/Validation.js

@@ -931,11 +931,16 @@
             "auto",
             "none",
             "pan-x",
-            "pan-y"
+            "pan-y",
+            "pan-left",
+            "pan-right",
+            "pan-up",
+            "pan-down"
+            "manipulation"
         ],
 
         invalid: {
-            "foo" : "Expected (auto | none | pan-x | pan-y) but found 'foo'."
+            "foo" : "Expected (auto | none | pan-x | pan-y | pan-left | pan-right | pan-up | pan-down | manipulation) but found 'foo'."
         }
     }));
 
@@ -946,11 +951,16 @@
             "auto",
             "none",
             "pan-x",
-            "pan-y"
+            "pan-y",
+            "pan-left",
+            "pan-right",
+            "pan-up",
+            "pan-down"
+            "manipulation"
         ],
 
         invalid: {
-            "foo" : "Expected (auto | none | pan-x | pan-y) but found 'foo'."
+            "foo" : "Expected (auto | none | pan-x | pan-y | pan-left | pan-right | pan-up | pan-down | manipulation) but found 'foo'."
         }
     }));