Move build to dist.

.gitignore

@@ -1,5 +1,5 @@
 *.sublime-workspace
 .DS_Store
-build/
+dist/
 node_modules
 npm-debug.log

.npmignore

@@ -1,3 +1,3 @@
 *.sublime-*
-build/*.zip
+dist/*.zip
 test/

package.json

@@ -17,18 +17,18 @@
     "name": "Mike Bostock",
     "url": "http://bost.ocks.org/mike"
   },
-  "main": "build/d3-hierarchy.js",
+  "main": "dist/d3-hierarchy.js",
   "module": "index",
   "jsnext:main": "index",
   "repository": {
     "type": "git",
     "url": "https://github.com/d3/d3-hierarchy.git"
   },
   "scripts": {
-    "pretest": "rm -rf build && mkdir build && rollup --banner \"$(preamble)\" -f umd -n d3 -o build/d3-hierarchy.js -- index.js",
+    "pretest": "rm -rf dist && mkdir dist && rollup --banner \"$(preamble)\" -f umd -n d3 -o dist/d3-hierarchy.js -- index.js",
     "test": "tape 'test/**/*-test.js' && eslint index.js src",
-    "prepublishOnly": "npm run test && uglifyjs -b beautify=false,preamble=\"'$(preamble)'\" build/d3-hierarchy.js -c -m -o build/d3-hierarchy.min.js",
-    "postpublish": "git push && git push --tags && cd ../d3.github.com && git pull && cp ../d3-hierarchy/build/d3-hierarchy.js d3-hierarchy.v1.js && cp ../d3-hierarchy/build/d3-hierarchy.min.js d3-hierarchy.v1.min.js && git add d3-hierarchy.v1.js d3-hierarchy.v1.min.js && git commit -m \"d3-hierarchy ${npm_package_version}\" && git push && cd - && zip -j build/d3-hierarchy.zip -- LICENSE README.md build/d3-hierarchy.js build/d3-hierarchy.min.js"
+    "prepublishOnly": "npm run test && uglifyjs -b beautify=false,preamble=\"'$(preamble)'\" dist/d3-hierarchy.js -c -m -o dist/d3-hierarchy.min.js",
+    "postpublish": "git push && git push --tags && cd ../d3.github.com && git pull && cp ../d3-hierarchy/dist/d3-hierarchy.js d3-hierarchy.v1.js && cp ../d3-hierarchy/dist/d3-hierarchy.min.js d3-hierarchy.v1.min.js && git add d3-hierarchy.v1.js d3-hierarchy.v1.min.js && git commit -m \"d3-hierarchy ${npm_package_version}\" && git push && cd - && zip -j dist/d3-hierarchy.zip -- LICENSE README.md dist/d3-hierarchy.js dist/d3-hierarchy.min.js"
   },
   "devDependencies": {
     "benchmark": "^2.1.4",