Install sass and compass before to run build on Travis

Fixes liferay#90

.travis.yml

@@ -1,9 +1,17 @@
 language: node_js
 node_js:
-- "0.11"
 - "0.10"
+- "0.8"
+
+before_script:
+  - 'gem update --system'
+  - 'gem install sass'
+  - 'gem install compass'
 
 env:
   global:
     - secure: HZWsDht46lHKOVo6qX45TZd64thlnjlet6xJ7/4ZKrO4sTLSKxjU2BCaFA51CrLvW0Syy1VFXIleEGN5IBTUKinEayhJXPl9OL2Vc1o/UTPLXXoqtqpO5HeoR1MfxQAr7VV37KhPWEao0NESYBpf3BR5bBQnPAltwellc7SQVtY=
-    - secure: FCb1Vr9+uTsb62dtWA+/gFd3dOWhdoz94+0Y4QqipRAwSU3UydTKdiGZmJ8dzPjMcZmRRuOVcTsFPwQgQfkNOg+lWdwU3kHbhGBCOlD3hIQ7cui72n4KT57AcvsS1d1gCDmtHarbNE/yuYpKB/LeBMaE3NCxswKgTThOrFGKDWs=
+    - secure: FCb1Vr9+uTsb62dtWA+/gFd3dOWhdoz94+0Y4QqipRAwSU3UydTKdiGZmJ8dzPjMcZmRRuOVcTsFPwQgQfkNOg+lWdwU3kHbhGBCOlD3hIQ7cui72n4KT57AcvsS1d1gCDmtHarbNE/yuYpKB/LeBMaE3NCxswKgTThOrFGKDWs=
+
+addons:
+  sauce_connect: true