fix for #386
Merge pull request #387 from hrgdavor/fix-386

fix for #386
add a shebang line to all Ruby examples + chmod to be executable
Merge pull request #388 from jhoblitt/ruby_shebang

add a shebang line to all Ruby examples + chmod to be executable
Preparing Chinese docbook to pdf

see bin/mkpdf

$ dblatex -V -t tex -p zh/custom.xsl book.xml
$ xelatex -interaction=nonstopmode book.tex
mkhtml
Add chinese translation: part of chapter1
Update chapter1.md
Add chinese translation: preface
Add vagrant and ansible provision
Update preface
Update zh chapter1