Merge tag '1.2.5' into develop

Minor changes:

* fixed installation with `pip`
* fixed running on Windows (see #11)

Author: Michele Tessaro

setup.py

@@ -15,7 +15,7 @@
 
 setuptools.setup(
     name="plantuml-markdown",
-    version="1.2.5-rc1",
+    version="1.2.5",
     author="Michele Tessaro",
     author_email="[email protected]",
     description="A PlantUML plugin for Markdown",