Squashed 'vendor/assets/javascripts/d3/plugins/' changes from 3738859..42102dc

42102dc Link to vertical demo.
b7bc72f d3.bullet: inherit transitions.
c0c9e10 Add bullet.orient(top | bottom). Fixes #63.
c4b8468 Delete obsolete d3.cie plugin.
4f62132 Simplify and add tests for eckert4.invert.
c29435e Merge remote-tracking branch 'fatzh/master'
fb5af96 - fixed eckert IV invert function
f1a188c Add gallery.
0ee5fd8 Update README.md
ab88074 Add d3.geo.ginzburg{4,5,6,8,9}.

git-subtree-dir: vendor/assets/javascripts/d3/plugins
git-subtree-split: 42102dcc0142d3025295740dcdb71999f216a71a
Merge commit '0dd17b772d9ed847c25aac8065fdce3784865d6e'

* commit '0dd17b772d9ed847c25aac8065fdce3784865d6e':
  Squashed 'vendor/assets/javascripts/d3/plugins/' changes from 3738859..42102dc
Update d3 plugins