Chinese Intro and Tutorial.lyx: make files compilable wit XeTeX

- both files: remove \CJKindent which prevented the compilation with XeTeX, load the xeCJK package which is necessary to get text lines broken at the page margin
Both files are still compilable with pdfTeX because then xeCJk does simply nothing.
- Intro: replace TeX code by its LyX inset and alsoremove unnecessary document class option "cjk"

lib/doc/zh_CN/Intro.lyx

@@ -3,7 +3,9 @@
 \begin_document
 \begin_header
 \textclass article
-\options cjk
+\begin_preamble
+\usepackage{xeCJK}
+\end_preamble
 \use_default_options true
 \maintain_unincluded_children false
 \language chinese-simplified
@@ -76,22 +78,6 @@
 
 \begin_body
 
-\begin_layout Standard
-\begin_inset ERT
-status collapsed
-
-\begin_layout Plain Layout
-
-
-\backslash
-CJKindent
-\end_layout
-
-\end_inset
-
-
-\end_layout
-
 \begin_layout Title
 LyX 简介
 \end_layout
@@ -1366,16 +1352,7 @@ type "mailto:"
 \end_layout
 
 \begin_layout Standard
-\begin_inset ERT
+\begin_inset Newpage clearpage
-status open
-
-\begin_layout Plain Layout
-
-
-\backslash
-clearpage
-\end_layout
-
 \end_inset
 
 

lib/doc/zh_CN/Tutorial.lyx

@@ -9,7 +9,7 @@
 %中文断行 
 %\XeTeXlinebreaklocale "zh"
 %\XeTeXlinebreakskip = 0pt plus 1pt 
-\usepackage{CJK}
+\usepackage{xeCJK}
 \end_preamble
 \options cjk
 \use_default_options true
@@ -85,22 +85,6 @@
 
 \begin_body
 
-\begin_layout Standard
-\begin_inset ERT
-status collapsed
-
-\begin_layout Plain Layout
-
-
-\backslash
-CJKindent
-\end_layout
-
-\end_inset
-
-
-\end_layout
-
 \begin_layout Title
 The LyX Tutorial
 \end_layout