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`.
Merge pull request #14 from usrbincc/jshintrc-json-format--fixes

Fix some bugs with the comment handling.