Added examples, improved docs

examples/show_artist_top_tracks.py

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+# shows artist info for a URN or URL
+
+import spotipy
+import sys
+import pprint
+
+if len(sys.argv) > 1:
+    urn = sys.argv[1]
+else:
+    urn = 'spotify:artist:3jOstUTkEu2JkjvRdBA5Gu'
+
+sp = spotipy.Spotify()
+response = sp.artist_top_tracks(urn)
+
+for track in response['tracks']:
+    print track['name']

examples/show_user.py

@@ -0,0 +1,17 @@
+
+# shows artist info for a URN or URL
+
+import spotipy
+import sys
+import pprint
+
+if len(sys.argv) > 1:
+    username = sys.argv[1]
+else:
+    username = 'plamere'
+
+sp = spotipy.Spotify()
+sp.trace = True
+user = sp.user(username)
+pprint.pprint(user)
+