wch/ggplot2 — pull request #2 by kohske (2012-04-14 06:52:05+00:00)
Title: Expansion of scales: moves expand calculation in coord_train.

I slightly changed the general structure.
Now the expansion is implemented only in coord-cartesian.
If test passes, then we can apply it to all other coords.

Next step is tweaking scale-.r.
Especially, the range of breaks should be determined by coords/guides.
This will fix issue #430, #422, and #416.