Updated docstrings

svg/charts/__init__.py

@@ -1,4 +1,8 @@
 #!python
 # -*- coding: UTF-8 -*-
 
+"""
+svg.charts package.
+"""
+
 __all__ = ('graph', 'plot', 'time_series', 'bar', 'pie', 'schedule', 'util')

svg/charts/graph.py

@@ -1,6 +1,12 @@
 #!python
 # -*- coding: UTF-8 -*-
 
+"""
+svg.charts.graph
+
+The base module for `svg.charts` classes.
+"""
+
 from operator import itemgetter
 from itertools import islice
 import pkg_resources