[changed] Source to ES6 using Babel and Webpack

A lot has happened since this projects inception and newer tools are
available that can facilitate a better development environment. This
work gives the project structure a facelift to meet the current trends
of the broader React community.

- Source cleanup
  - Rename all js files to *.js
  - Use [Babel](http://babeljs.io/) for our es6 -> es5 transpilation
  - Update all js to es6 standards
    - src
    - test
    - docs
    - doc examples
    - ie8 visual test
  - [ESLint](http://eslint.org/) all .js files
- Build
  - Use [Webpack](http://webpack.github.io/) - This should provide more
    control on how we build our pre-concatenated and minified releases.
  - Drop Grunt, use npm scripts and shell scripts where needed.
  - Promise based release process (faster)
  - Update README to explain how to run.
- Test
  - Single karma config file
  - Not dependent on building src to disk to run, use
    [karma-webpack](https://github.com/webpack/karma-webpack) which will
    build the src in memory.
  - Better test watcher that re-runs tests when changing src files.
    Current watcher only runs if test files change.
  - Fail on linting errors
  - Pull `es5-shim` from npm
- Docs
  - Pull `bootstrap` from npm
  - Pull `codemirror` from npm
  - Use in browser Babel transformer for doc examples
  - Consolidate package.json deps and scripts to repo root. Leads to
    less confusion on how to run the docs locally.
  - Update README for local setup.

Author: mtscout6

.editorconfig

@@ -0,0 +1,18 @@
+# EditorConfig is awesome: http://EditorConfig.org
+
+# top-most EditorConfig file
+root = true
+
+# Unix-style newlines with a newline ending every file
+[*]
+end_of_line = lf
+insert_final_newline = true
+
+[*.js]
+charset = utf-8
+indent_style = space
+indent_size = 2
+
+[{package.json,.travis.yml}]
+indent_style = space
+indent_size = 2

.eslintrc

@@ -0,0 +1,32 @@
+{
+  "env": {
+    "browser": true,
+    "node": true
+  },
+  "ecmaFeatures": {
+    "jsx": true
+  },
+  "parser": "babel-eslint",
+  "plugins": [
+    "react"
+  ],
+  "rules": {
+    "comma-spacing": 1,
+    "key-spacing": 0,
+    "no-underscore-dangle": 0,
+    "no-unused-vars": [1, { "vars": "all", "args": "none" }],
+    "no-undef": 1,
+    "no-var": 2,
+    "quotes": [1, "single", "avoid-escape"],
+    "react/display-name": 0,
+    "react/jsx-uses-react": 1,
+    "react/no-did-mount-set-state": 1,
+    "react/no-did-update-set-state": 1,
+    "react/no-multi-comp": 1,
+    "react/prop-types": 1,
+    "react/react-in-jsx-scope": 1,
+    "react/self-closing-comp": 1,
+    "react/wrap-multilines": 1,
+    "strict": 0
+  }
+}