Added an example component that does the bare minimum

.gitignore

@@ -6,6 +6,7 @@ homeassistant/components/http/www_static/polymer/bower_components/*
 !config/custom_components
 config/custom_components/*
 !config/custom_components/example.py
+!config/custom_components/hello_world.py
 
 # Hide sublime text stuff
 *.sublime-project

config/custom_components/hello_world.py

@@ -0,0 +1,22 @@
+"""
+custom_components.hello_world
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Implements the bare minimum that a component should implement.
+"""
+
+# The domain of your component. Should be equal to the name of your component
+DOMAIN = "hello_world"
+
+# List of component names (string) your component depends upon
+DEPENDENCIES = []
+
+
+def setup(hass, config):
+    """ Setup our skeleton component. """
+
+    # States are in the format DOMAIN.OBJECT_ID
+    hass.states.set('hello_world.Hello_World', 'Works!')
+
+    # return boolean to indicate that initialization was successful
+    return True