Plugin system

[Prinzhorn]

I'm thinking about dropping hsl support from skrollr core, because it's only needed for IE < 9 (and some very old Firefox etc.). I'd drop the IE "filter" stuff at the same time.

Instead of having those in core, it would available be as a plugin which transforms hsl to hex on the fly. This change could make skrollr core close to 5k small.

How plugins could work or how the api could look like: Allow plugins to hook into the setStyle method. This would allow transforming hsl as well as adding the IE filter style. Other entry points for plugins could later be specified.

Well, actually I'm not thinking about this, I will just do it.

[karbassi]

+1

[Prinzhorn]

Check out branch "better-parser" for progress on this and #13. https://github.com/Prinzhorn/skrollr/tree/better-parser
IE plugin: https://github.com/Prinzhorn/skrollr/blob/better-parser/plugins/skrollr.ie.js

skrollr core is now at 5.3k (from 7.5k).