support no cache buster for css filename but with icon files

[adyliu]

usage: --cachebuster-filename --nocachebuster_cssfilename

[jorgebastida]

Hello @adyliu - Could you please explain what's the use case of this feature?

[adyliu]

We need the images with cachebuster filename to remove the cache in the CDN service, but the css files will been renamed and deployed to the CDN with other tools.

So the original file name must been kept for the css files except the images.

[oleg-codaio]

This would actually be pretty useful.

For instance, I use glue with Sass and for the @include statement to correctly insert the contents of the file into my main CSS file, I need the sprite css file to be constant.

Right now my workaround is to have a step that removes these endings from the CSS file.

[ianva]

Nice feature! +1

[tokki]

Nice feature! +1

[qddxct]

perfect feature!

[sarowlwp]

Useful feature ~

[tingwind]

Useful feature ~

[jorgebastida]

I'm going to review this during the weekend and probably merge it.
btw @sarowlwp @qddxct are you using glue at Sohu.com?

[jorgebastida]

I've just pushed into master a new option named --cachebuster-filename-only-sprites. This option will make glue only cachebust sprite images and not CSS files. I'm going to release this changes as glue 0.9.2.

@adyliu Thank you very much for your Pull Request. Unfortunately I can't use it as we rewrote glue from scratch from 0.4 to 0.9. I've add you to the AUTHORS file.