更新changelog
data example
ignore .DS_Store
update help dialog
dialogs
Merge pull request #100 from fex-team/release-1.2.0

Release 1.2.0
Merge pull request #97 from yangxiaohu2014/help-dialog

Update Help dialog
Merge branch 'help-dialog' of github.com:fex-team/kityminder into help-dialog
操作说明
update help dialog
Merge pull request #102 from yangxiaohu2014/help-dialog

update help dialog
help dialog
merge help-dialog
dist
dist
dist
help dialog
Update Kity
添加批量渲染的机制

避免因为循环单个渲染时不断读写造成的浏览器性能问题
历史回退使用动画