fix: use height_cm instead of width_cm
New themes panel.margin.x and panel.margin.y

Fixes #839

Conflicts:
	NEWS
	R/facet-grid-.r

Resolved trivially.
Roxygenize
Merge branch 'master' into feature/839-facet-margin-2
Merge branch 'master' into feature/839-facet-margin-2
Quick approximation for map projections

Instead of reprojecting everything, we just set the aspect ratio
of the plot to the ratio between the length of one degree of lat
over one degree of lon.
Fix bug in documentation

The latest version of roxygen figures out S3 methods on its own
Add initial stab at position_jitterdodge
Updates to position_jitterdodge()

  * Motivate the change in NEWS
  * Fix the style
  * Allow jitter.width, jitter.height, dodge.width as arguments
  * Improve the documentation
Fix coding style and spelling for new coord_quickmap
Add NEWS bit for coord_quickmap
Better strategy for detecting calculated aes.
Closes #935
Fix typo in aes match
Delete old function
Add aes_q
Use aes_q in borders to eliminate check warning
Avoid special evaluation in collide
Avoid more non-standard evaluation
Merge branch 'master' of github.com:kevinushey/ggplot2 into kevinushey-master
Merge branch 'quickmap' of github.com:jiho/ggplot2 into jiho-quickmap