Accept json format for '~/.jshintrc'.
Remove comments and use `JSON.parse` for `~/.jshintrc`.
Prepend, don't append `/*jshint*/` style `.jshintrc`.
Fix `*`s in regexps for `allcomments` and `removecomments`.
Make `allcomments` accept strings containing multiple comments.
Replace comments with a space to avoid pasting tokens.

```js
{"example":4/* should not result in '42' */2}
```
Fix `removecomments` triggering on strings containing comment patterns.
Add caveat about the limitations of `removecomments`.
updating to jshint 2.0
updating jshint to 2.1.2