excludes path handling

I'm using windows, so path are not using `/` but `\`. 
I can't seem to ignore a whole folder deep in the handled path
For example:
```
"excludes": [
        "node_modules/",
        "lib",
        "mocha.styl"
    ]
```
do work but not 
```
    "excludes": [
        "node_modules/",
        "./views/css/lib",
        "./views/css/test/components/mocha.styl"
    ]
```