Allow LESS css files for compression that will be used on the client

[supercodepoet]

If you want to allow the less.js to parse the LESS css files on the client you need to set the rel attribute to stylesheet/less. Doing this makes django-compressor skip the files as it looks for rel="stylesheet". It would be great to have a CSS_COMPRESSOR that we could configure that would assume the files are LESS and compress them and out put one link element with the rel set to stylesheet/less so that less.js will parse the compressed file.

[jezdez]

I'm not convinced that this should be an own feature of the compressor, but you can override the used CSS compressor class with the COMPRESSOR_CSS_COMPRESSOR setting. Refactoring the default CssCompressor class to easier define what should be considered a file to compress wouldn't be hard (e.g. elem_<elem_name> method hooks that could be re-implemented in an own subclass).

[supercodepoet]

This is what I actually ended up doing. It was basically the exact same as the CssProcessor but allowing stylesheet/less when parsing the files and a new template that outputs the link element with a rel="stylesheet/less". This worked really well and allowed the less.js file to parse the resulting compressed file.