Auto merge of servo#118 - emilio:color, r=SimonSapin

Use a more compact RGBA color representation.

r? @SimonSapin

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Author: bors-servo

Cargo.toml

@@ -1,7 +1,7 @@
 [package]
 
 name = "cssparser"
-version = "0.7.4"
+version = "0.8.0"
 authors = [ "Simon Sapin <simon.sapin@exyr.org>" ]
 
 description = "Rust implementation of CSS Syntax Level 3"