hadley/ggplot2 — pull request #368 by wch (2012-01-23 04:23:40+00:00)
Title: Implement coord_range

This is an implementation of coord_range. This is the third attempt at resolving the issue raised by #361, and followed out of a discussion #364. I decided to start over because it's cleaner this way.

I've done the following:

* implement coord_range
* fix coord_map to use `x.range` and `x.proj`, instead of `x.raw` and `x.range`
* modify abline, hline, and vline to use coord_range
* add visual tests