Version bump to 0.5.2. Showdown version updated.

Author: Kreozot

package.json

@@ -8,7 +8,7 @@
     "generator"
   ],
   "homepage": "https://github.com/millermedeiros/mdoc.git",
-  "version": "0.5.1",
+  "version": "0.5.2",
   "author": {
     "name": "Miller Medeiros",
     "url": "http://blog.millermedeiros.com/"
@@ -30,7 +30,7 @@
   "dependencies": {
     "commander": ">= 0.4.0",
     "handlebars": ">= 1.0.1",
-    "showdown": "=1.2.3",
+    "showdown": "^1.3.0",
     "wrench": ">= 1.3.2"
   },
   "bin": {