Merge branch 'suzhi'
Merge branch 'suzhi' into develop
--pdf lib

pdb lib complete
Merge remote-tracking branch 'origin/develop' into weikai

Conflicts:
	esapsign.xcodeproj/project.pbxproj
	esapsign/Plugin_PDF/CAnot.mm
	esapsign/Plugin_PDF/PDFDocument.mm
	esapsign/Plugin_PDF/fgsdk_common.cpp
	pdf/pdf.xcodeproj/project.pbxproj
test

ignore something
Merge branch 'weikai' into develop
打补丁
Change the logical for draw image into pdf
Revert 9554983..9a54fac

This rolls back to commit 9554983dc93a60690fe5c6dbe899c777ad1b9874.
-pdf、layout、qrcode crame
--change the tab bar's height -- by weikai

修改了left tabbar的高度，将其在ios7下由56改为49.
--add contains for doclistview's bottom

给右侧底部添加Constants—by weikai
Merge branch 'wk_bugs' into develop
Merge branch 'suzhi' into develop
Merge branch 'develop' into suzhi
iOS 8适配：通讯录界面，拖拽签名图方向问题

这个版本为了避免可能出现的target中file_id非空但refFile为空的状态，增加了很多数据度更新时的refreshOjbect操作。但
还是会有状况发生
iOS8适配：7/8兼容界面优化
CoreData: target.refFile引用处理