v0.6.4

AlgebraOfGraphics v0.6.4

Diff since v0.6.3

Closed issues:

• Very slow plotting of pair() type plot compared to R (#315)
• Xminor ticks don't go to all columns when faceting (#325)
• Negative values in density plot (#334)

Merged pull requests:

• Add tests for facet plots (#336) (@piever)
• better error message for cycle (#337) (@piever)
• fix bug in categorical scales for y mapping (#338) (@piever)
• test alignmode (#339) (@piever)
• Fix a typo in the docs (#340) (@pitmonticone)
• temporarily remove antarctica example (#341) (@piever)
• avoid dictionary (#342) (@piever)
• fix varying eltype in palette (#343) (@piever)