Kozea/pygal — pull request #154 by blakev (2014-09-02 05:57:37+00:00)
Title: Add line stroke customization parameters to style.py

Added stroke_width, stroke_style and stroke_dasharray to style.py -- defaults are such that the original style remains the same, but now one can further customize the look of the lines in their graphs. I also added the appropriate unit tests.

Sample:
```
import pygal

config = pygal.Config()

config.dots_size = 0

custom_style = pygal.style.Style(
stroke_width = 3,
stroke_style = "miter",
stroke_dasharray = '5,5'
)

line_chart = pygal.Line(config, style = custom_style)
line_chart.title = 'Browser usage evolution (in %)'
line_chart.x_labels = map(str, range(2002, 2013))
line_chart.add('Firefox', [None, None, 0, 16.6, 25, 31, 36.4, 45.5, 46.3, 42.8, 37.1])
line_chart.add('Chrome', [None, None, None, None, None, None, 0, 3.9, 10.8, 23.8, 35.3])
line_chart.add('IE', [85.8, 84.6, 84.7, 74.5, 66, 58.6, 54.7, 44.8, 36.2, 26.6, 20.1])
line_chart.add('Others', [14.2, 15.4, 15.3, 8.9, 9, 10.4, 8.9, 5.8, 6.7, 6.8, 7.5])
line_chart.render_in_browser()
```