utf-8 support for axis labels

[Brandon Thomson]

This is my diff for utf-8 support in the axis labels... it seems to
work well enough.

=== modified file 'root/pygooglechart.py'
--- root/pygooglechart.py 2009-01-24 20:04:47 +0000
+++ root/pygooglechart.py 2009-03-05 13:54:01 +0000
@@ -604,7 +604,7 @@

def set_axis_labels(self, axis_type, values):
assert(axis_type in Axis.TYPES)
- values = [urllib.quote(str(a)) for a in values]
+ values = [urllib.quote(a.encode("utf-8")) for a in values]
axis_index = len(self.axis)
axis = LabelAxis(axis_index, axis_type, values)
self.axis.append(axis)