Fixed #64 by passing through .map extensions unchanged
Prevented source maps from being loaded as page resources
Fixed mocha test config
Added travis.yml
Fixed 4 unit test failures
Merge pull request #78 from bpeacock/master

Fixed #64 & Added Travis.yml
passing tests
bump version
Add filename option to less render

NAP crashes, through less, when trying to include a file like below
when the filename option isn't set.

I'm guessing less will be running everything relative of where NAP is
being called and as such won't find the file.

```css
@import "../bower_components/bootstrap/less/bootstrap.less";
```