add images
Merge branch 'master' of https://github.com/lhyqy5/material_design_zh
Merge pull request #120 from IceskYsl/master

完成我认领的部分
leiweibo 认领：List controls
Merge pull request #121 from vincent4j/master

leiweibo 认领：List controls
traditional to simplified.
完成 Switches 章节剩下的两端
Merge pull request #123 from vincent4j/master

完成 Switches 章节剩下的两端
ajust the readme
structure 繁体转简体
Merge branch 'DonLiangGit-master'
结构章节：繁体转简体
更新进度 structure
Merge pull request #125 from vincent4j/master

更新进度 structure
《Introduction》第一遍校对完成。
基本完成imagery的翻译
Merge branch 'master' of https://github.com/1sters/material_design_zh
完成Search
Merge pull request #127 from lhyqy5/master

完成search,基本完成imagery
更新进度 Search
Merge pull request #128 from vincent4j/master

更新进度 Search