Adapt to compose changes.
Changes to allow plotting any vaguely numerical type.
Fix incorrect scientific notation exponents.
Fix a couple things that broke with the compose updates.
Assume an Any array is categorical data.
Fix default scales for aesthetics used only in explicit layers.
Try harder to avoid overplotting subplot labels.
Declare Theme using @varset
Some changes needed to plot Datetime types.
Support for plotting Dates. (Fixes #78)
Added layer documentation
Merge pull request #94 from Calder/patch-1

Added layer documentation
Added shorthand for function layers.
Fixed warnings for functions min and max.
Merge pull request #97 from LanguageProcessingUnit/master

Fixed warnings for functions min and max.
Re-added plot macro (oops!) and added corresponding layer macro.
REQUIRE: fix this to reflect actual requirements.
Fix more min/max warnings.
Make Themes more usable.
Merge branch 'layer-poetry' of https://github.com/Calder/Gadfly.jl into Calder-layer-poetry