Added simple readme

Author: pix0r

README.md

@@ -0,0 +1,19 @@
+A simpe Python client for http://pushover.net/ API
+
+Install:
+
+    pip install https://github.com/pix0r/pushover.git
+
+Usage:
+
+	from pushover import pushover
+
+	pushover(message="Hello, world",
+	    token="My App Token",
+		user="My User Key",
+		)
+	
+Or using command line utility:
+
+    pushover "Hello, world" --token="My App Token" --user="My User Key"
+