Merge branch 'master' into v4

addon/dialog/dialog.js

addon/hint/anyword-hint.js

addon/hint/show-hint.js

addon/runmode/runmode.node.js

bin/source-highlight

demo/variableheight.html

doc/manual.html

doc/realworld.html

keymap/vim.js

lib/codemirror.css

lib/codemirror.js

mode/julia/julia.js

mode/markdown/markdown.js

mode/markdown/test.js

mode/rst/index.html

mode/rst/rst.js

test/vim_test.js