remove output plot from test code
remove output plot from test code.
update test code and remove output plot.
legend-box: now align to plot region instead of device region.
plot-render: add a helper function for inspecting panel region.
plot-render: bug fix for incorrect positioning of y-label. now, labels, title, and legends are aligned to plot region.
guides: legend.justification can work with legend.position = "left", etc.
guides: cleaning up theme and opts.
legend guide: support reversed order.
guide-colorbar: fix a bug in rastar colorbar
Merge branch 'patch-3' into merged
Merge branch 'feature/new-guides-with-gtable' into merged
Merge branch 'fix/minor-breaks' into merged

Conflicts:
	R/scale-.r
	man/continuous_scale.Rd
Merge branch 'fix/scale-breaks' into cutting-edge
fix a bug (?): support transparency for the filled area of geom_boxplot.
Merge branch 'fix/geom-boxplot-alpha' into cutting-edge
bug fix: alpha in geom-boxplot affects only the fill of box (#252).
Merge branch 'fix/geom-boxplot-alpha' into cutting-edge
Merge branch 'develop' into cutting-edge
stat-aggr2d and stat-aggrhex: implementation of 2d aggregation.