waitUntilValid function using ready function

Allow slash in filename regex

use res.end: reverting #27

use res.send instead of res.end to enable etag.

Fix serving index.html on Windows

Using path.join for memory-fs leads to problems on Windows, because the
path module will be path...

Fixed a typo (optimation --> optimization)

Use watchOptions instead of solely allowing watchDelay

(multiStep)

fixes #14

Use case:

```json
watchOptions: {
poll: true
}
```

in `webpack.config.js`.

This is analogou...

add Content-Length header to response

use res.send instead of res.end to enable etag.

When bundle is large, I download the script using XMLHttpRequest, so
that the download progress ...

Check for index.html when serving directories

[output] Add a minimal output option for the middleware

updated dependency

Add close support

Added repository field

fixes #7

Fix invalid next() invocation in filename resolver.

Added MIME-Type guessing

Related to peerigon/alamid#144

Added Content-Type header

Removes a warning from Chrome.