Replace requireStylesheet calls w/ @import directives in atom.less

src/app/config.coffee

@@ -17,6 +17,7 @@ class Config
   themeDirPaths: [userThemesDirPath, bundledThemesDirPath, vendoredThemesDirPath]
   packageDirPaths: [userPackagesDirPath, vendoredPackagesDirPath, bundledPackagesDirPath]
   userPackagesDirPath: userPackagesDirPath
+  lessSearchPaths: [fsUtils.join(resourcePath, 'static')]
   defaultSettings: null
   settings: null
   configFileHasErrors: null

src/app/window.coffee

@@ -25,12 +25,7 @@ window.setUpEnvironment = ->
   $(document).on 'keydown', keymap.handleKeyEvent
   keymap.bindDefaultKeys()
 
-  requireStylesheet 'reset'
   requireStylesheet 'atom'
-  requireStylesheet 'overlay'
-  requireStylesheet 'popover-list'
-  requireStylesheet 'notification'
-  requireStylesheet 'markdown'
 
   if nativeStylesheetPath = fsUtils.resolveOnLoadPath(process.platform, ['css', 'less'])
     requireStylesheet(nativeStylesheetPath)
@@ -142,7 +137,12 @@ window.requireStylesheet = (path) ->
 window.loadStylesheet = (path) ->
   content = fsUtils.read(path)
   if fsUtils.extension(path) == '.less'
-    (new less.Parser({})).parse content, (e, tree) ->
+    parser = new less.Parser
+      syncImport: true
+      paths: config.lessSearchPaths
+      filename: path
+
+    parser.parse content, (e, tree) ->
       throw new Error(e.message, path, e.line) if e
       content = tree.toCSS()