Add an EditorConfig and clean up readme

Note: introducing these changes raises a question in the coveralls
example at the bottom: does `nyc` really need to be run again for the
report to be available? and wouldn’t it be better just to have the lcov
report generated alongside the regular text display, and have the
`after_success` command just `cat` and pipe it to `coveralls`?

.editorconfig

@@ -0,0 +1,20 @@
+# EditorConfig helps developers define and maintain consistent
+# coding styles between different editors and IDEs
+# editorconfig.org
+
+root = true
+
+[*]
+
+# Change these settings to your own preference
+indent_style = space
+indent_size = 2
+
+# We recommend you to keep these unchanged
+end_of_line = lf
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true
+
+[*.md]
+trim_trailing_whitespace = false

README.md

@@ -68,8 +68,9 @@ nyc --extension .jsx --extension .es6 npm test
 ```
 
 ```json
-{"nyc": {
-  "extensions": [
+{
+  "nyc": {
+    "extensions": [
       ".jsx",
       ".es6"
     ]
@@ -121,7 +122,7 @@ You can tell nyc to exclude specific files and directories by adding
 an `nyc.exclude` array to your `package.json`. Each element of
 the array is a glob pattern indicating which paths should be omitted.
 
-Globs are matched using [micromatch](https://www.npmjs.com/package/micromatch)
+Globs are matched using [micromatch](https://www.npmjs.com/package/micromatch).
 
 In addition to patterns specified in the package, nyc will always exclude
 files in `node_modules`.
@@ -131,8 +132,9 @@ any files with the extension `.spec.js`, and anything in the `build`
 directory:
 
 ```json
-{"nyc": {
-  "exclude": [
+{
+  "nyc": {
+    "exclude": [
       "**/*.spec.js",
       "build"
     ]
@@ -176,7 +178,7 @@ You can run `nyc` with the optional `--cache` flag, to prevent it from
 instrumenting the same files multiple times. This can signficantly
 improve runtime performance.
 
-## Configuring nyc
+## Configuring `nyc`
 
 Any configuration options that can be set via the command line
 can also be specified in the `nyc` stanza of your package.json:
@@ -187,7 +189,7 @@ can also be specified in the `nyc` stanza of your package.json:
     "lines": 99,
     "check-coverage": false,
     "report-dir": "./alternative"
-  },
+  }
 }
 ```
 
@@ -210,28 +212,28 @@ integrated with coveralls and travis-ci.org:
 
 1. add the coveralls and nyc dependencies to your module:
 
-```shell
-npm install coveralls nyc --save
-```
+  ```shell
+  npm install coveralls nyc --save
+  ```
 
 2. update the scripts in your package.json to include these bins:
 
-```bash
-{
-  "script": {
-    "test": "nyc tap ./test/*.js",
-    "coverage": "nyc npm test && nyc report --reporter=text-lcov | coveralls",
+  ```json
+  {
+     "script": {
+       "test": "nyc tap ./test/*.js",
+       "coverage": "nyc report --reporter=text-lcov | coveralls"
+     }
   }
-}
-```
+  ```
 
 3. For private repos, add the environment variable `COVERALLS_REPO_TOKEN` to travis.
 
 4. add the following to your `.travis.yml`:
 
-```yaml
-after_success: npm run coverage
-```
+  ```yaml
+  after_success: npm run coverage
+  ```
 
 That's all there is to it!