Support colors in rgb / rgba for parametric styles
Merge branch 'master' of github.com:Kozea/pygal
Bump to 1.5.0. Fix #142
Add `stack_from_top` option to reverse stack graph data order. Fix #141
Reorders axes in SVG output. Fix #145

Currently pygal renders the x-axis before the y-axis, but this means
that because of the painters algorithm, the horizontal guide lines of
the y-axis are above the y-axis line (which is actually an x-axis
guide). If you have custom css that changes the colours of horizontal
guide lines, for example to hide them until hovered over, they create
visual gaps in the y-axis.
Merge pull request #146 from sirlark/axis_reordering

Reorders axes in SVG output. Fix #145