Ignore extra characters at filename end in search


When working with certain bower assets (esp. webfonts). CSS paths may include extra characters intended to promote wide cross-browser compatibility and may not relate to the actual file on the file system. e.g.

```css
//https://github.com/driftyco/ionicons/blob/v1.4.1/css/ionicons.css#L7
@font-face { font-family: "Ionicons"; src: url("../fonts/ionicons.eot?v=1.4.1"); src: url("../fonts/ionicons.eot?v=1.4.1#iefix") format("embedded-opentype"), url("../fonts/ionicons.ttf?v=1.4.1") format("truetype"), url("../fonts/ionicons.woff?v=1.4.1") format("woff"), url("../fonts/ionicons.svg?v=1.4.1#Ionicons") format("svg"); font-weight: normal; font-style: normal; }
```

In this case, the file name `../fonts/ionicons.eot?v=1.4.1` contains the suffix `?v=1.4.1`. The actual file the revved finder needs to find is `ionicons.eot`. When the revvedfinder runs `path.extname` and `path.basename` on this file name. The extname is assigned `.1` and the basename is assigned `ionicons.eot?v=1.4`. The file is not found, and not replaced in usemin. Eventually causing builds to contain incorrectly referenced font paths. 

```
> var path = require('path');
undefined
> var filename = '../../ionicons.css?v=1.4.1';
undefined
> var extname = path.extname(filename)
undefined
> extname
'.1'
> var basename = path.basename(filename, extname)
undefined
> basename
'ionicons.css?v=1.4'
```
This PR will preprocess the filename to remove these characters so that revvedfinder can find the file.

Relevant: https://github.com/yeoman/yeoman/issues/824#issuecomment-36075384