커스텀 컴포넌트 개발 시 CSS적용 시 참고사항

/*
 There are some caveats to this css sheet that I found. Yes, these issues made me feel stupid.
 Just as it says in the Livedocs:
  
 1. the css file MUST be named “defaults.css”
 2. the css file MUST be at your top level package
 3. only one css sheet per SWC

 see) http://www.unitedmindset.com/jonbcampos/2010/05/12/creating-custom-spark-components/
 see) http://livedocs.adobe.com/flex/3/html/help.html?content=mxmlcomponents_4.html
*/