add new content to 02/01

chapter1/README.html

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-    <div class="book"  data-level="1" data-basepath=".." data-revision="1401890107706">
+    <div class="book"  data-level="1" data-basepath=".." data-revision="1401895096940">
     <div class="book-header">
     <!-- Actions Left -->
     <a href="#" class="btn pull-left toggle-summary" aria-label="Toggle summary"><i class="fa fa-align-justify"></i></a>
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                 <div class="page-inner">
                 
-                    <section class="normal" id="section-gitbook_6">
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                         <h1 id="-swift">欢迎使用 Swift</h1>
 <p>在本章中您将了解 Swift 的特性和开发历史，并对 Swift 有一个初步的了解。</p>