Added a simple example plugin

It prints a single phrase when it hears the same phrase spoken.  Nothing
to brag about, just a cute example to show how to write a plugin.

kayleevc/plugins/simple.py

@@ -0,0 +1,34 @@
+# This is part of Kaylee
+# -- this code is licensed GPLv3
+# Copyright 2015-2016 Clayton G. Hobbs
+# Portions Copyright 2013 Jezra
+
+"""A simple plugin to serve as an example
+
+This is an extremely minimal Kaylee plugin to serve as an example for
+developing more complex plugins.  It takes a single configuration
+option, "phrase", which is a sentence to be recognized.  Once this is
+heard, the plugin prints "Simple plugin says: [phrase]".
+"""
+
+from .pluginbase import PluginBase
+
+
+class Plugin(PluginBase):
+    """Main class for the simple plugin"""
+
+    def __init__(self, config, name):
+        """Initialize the simple plugin"""
+        super().__init__(config, name)
+
+        self.corpus_strings.add(self.options['phrase'])
+
+    def recognizer_finished(self, recognizer, text):
+        """Print the phrase when it is spoken"""
+        # Is there a matching command?
+        if text == self.options['phrase']:
+            self.emit('processed', text)
+            print("Simple plugin says:", text)
+            return True
+        else:
+            return False