Merge pull request Kozea#334 from jkdf2/master

Give charts a descriptive title.

docs/index.rst

@@ -9,27 +9,31 @@ Sexy python charting
 .. pygal:: 300 200
 
    chart = pygal.HorizontalBar(y_label_rotation=-25)
+   chart.title = 'Horizontal Bar Chart with Rotated Y Labels'
    chart.x_labels = 'one', 'two', 'three', 'four', 'five'
    chart.add('alpha', [1, 2, 3, 1, 2])
    chart.add('beta', [4, 3, 0, 1, 2])
 
 .. pygal:: 300 200
 
    chart = pygal.Line(x_label_rotation=25, fill=True, interpolate='cubic')
+   chart.title = 'Line Chart with Rotated X Labels, Fill, and Cubic Interpolation'
    chart.x_labels = 'one', 'two', 'three', 'four', 'five'
    chart.add('alpha', [1, 2, 3, 1, 2])
    chart.add('beta', [4, 3, 0, 1, 2])
 
 .. pygal:: 300 200
 
    chart = pygal.Pie()
+   chart.title = 'An Ordinary Pie Chart'
    chart.x_labels = 'one', 'two', 'three', 'four', 'five'
    chart.add('alpha', [1, 2, 3, 1, 2])
    chart.add('beta', [4, 3, 0, 1, 2])
 
 .. pygal:: 300 200
 
    chart = pygal.Radar(fill=True)
+   chart.title = 'Radar Chart with Fill'
    chart.x_labels = 'one', 'two', 'three', 'four', 'five'
    chart.add('alpha', [1, 2, 3, 1, 2])
    chart.add('beta', [4, 3, 0, 1, 2])