Move CSS importing code into Gruntfile.coffee.

Gruntfile.coffee

@@ -8,6 +8,12 @@ module.exports = (grunt) ->
   json = (data) ->
     "`#{JSON.stringify(data).replace(/`/g, '\\`')}`"
 
+  importCSS = (filenames...) ->
+    grunt.template.process(
+      filenames.map((name) -> grunt.file.read "src/General/css/#{name}.css").join(''),
+      {data: grunt.config 'pkg'}
+    ).trim().replace(/\n+/g, '\n').split(/^/m).map(JSON.stringify).join(' +\n').replace(/`/g, '\\`')
+
   importHTML = (filename) ->
     html grunt.template.process(grunt.file.read("src/General/html/#{filename}.html").replace(/^ +/gm, '').replace(/\r?\n/g, ''), data: grunt.config('pkg'))
 
@@ -69,6 +75,7 @@ module.exports = (grunt) ->
       options: process: Object.create(null, data:
         get: ->
           pkg = grunt.config 'pkg'
+          pkg.importCSS  = importCSS
           pkg.importHTML = importHTML
           pkg.html = html
           pkg.assert = assert

src/General/Main.coffee

@@ -301,14 +301,7 @@ Main =
     $.ready ->
       cb() if Main.isThisPageLegit()
 
-  css: `<%=
-    grunt.template.process(
-      ['font-awesome', 'style', 'yotsuba', 'yotsuba-b', 'futaba', 'burichan', 'tomorrow', 'photon'].map(function(name) {
-        return grunt.file.read('src/General/css/'+name+'.css');
-      }).join(''),
-      {data: {type: type}}
-    ).trim().replace(/\n+/g, '\n').split(/^/m).map(JSON.stringify).join(' +\n').replace(/`/g, '\\`')
-  %>`
+  css: `<%= importCSS('font-awesome', 'style', 'yotsuba', 'yotsuba-b', 'futaba', 'burichan', 'tomorrow', 'photon') %>`
 
   features: [
     ['Polyfill',                  Polyfill]