Generate pack.css on the fly

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>

Author: dscho

assets/sass/jquery.fancybox.css renamed to assets/sass/jquery.fancybox.scss

@@ -0,0 +1,4 @@
+@import 'normalize';
+@import 'jquery.fancybox';
+@import 'style';
+@import 'small';

assets/sass/normalize.css renamed to assets/sass/normalize.scss

@@ -7,7 +7,7 @@
 		<meta name="description" content="We bring the awesome Git VCS to Windows">
 		<meta name="viewport" content="width=device-width, initial-scale=1">
 		<link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Open+Sans:300,400,700">
-		{{- $style := resources.Get "sass/pack.css" | resources.ExecuteAsTemplate "pack.css" . | css.Sass }}
+		{{- $style := resources.Get "sass/pack.scss" | resources.ExecuteAsTemplate "pack.scss" . | css.Sass | resources.Minify }}
 		<link rel="stylesheet" href="{{ $style.RelPermalink }}">
 		<style type="text/css">
 			body {