chore: update build script

* created a dist folder with a .keep file in it
  * you will no longer need the ```mkdir dist;``` in the build scripts (breaking for window)
* create build task for unminified source with source maps.
* create meta-build task to execute both builds

Author: Myles Borins

.gitignore

@@ -1,4 +1,4 @@
 node_modules/
 .DS_Store
-dist/
+dist/*.js
 *.log

dist/.keep

@@ -22,7 +22,9 @@
     "test": "EXIT_STATUS=0; npm run test-components || EXIT_STATUS=$?; npm run test-core || EXIT_STATUS=$?; npm run test-dom-renderables || EXIT_STATUS=$?; npm run test-dom-renderers || EXIT_STATUS=$?; npm run test-render-loops || EXIT_STATUS=$?; npm run test-math || EXIT_STATUS=$?; npm run test-physics || EXIT_STATUS=$?; npm run test-polyfills || EXIT_STATUS=$?; npm run test-renderers || EXIT_STATUS=$?; npm run test-transitions || EXIT_STATUS=$?; npm run test-utilities || EXIT_STATUS=$?; npm run test-webgl-geometries || EXIT_STATUS=$?; npm run test-webgl-materials || EXIT_STATUS=$?; npm run test-webgl-renderables || EXIT_STATUS=$?; npm run test-webgl-renderers; exit $EXIT_STATUS",
     "check-jsdoc": "eslint --reset --no-eslintrc --rule 'valid-jsdoc: 2' --ignore-path .gitignore .",
     "lint": "eslint --ignore-path .gitignore .",
-    "build": "mkdir dist; browserify index.js --standalone famous | uglifyjs --screw-ie8 -m -c dead_code,sequences,conditionals,booleans,unused,if_return,join_vars,drop_debugger > dist/famous.min.js"
+    "build": "npm run build-debug && npm run build-standalone",
+    "build-debug": "browserify index.js -d --standalone famous > dist/famous.js",
+    "build-min": "browserify index.js --standalone famous | uglifyjs --screw-ie8 -m -c dead_code,sequences,conditionals,booleans,unused,if_return,join_vars,drop_debugger > dist/famous.min.js"
   },
   "repository": {
     "type": "git",