Update ZSSRichTextEditor.m
Update ZSSRichTextEditor.m

1.fix viewController not delloc;
2.fix after pasting a paragraph of html text, the style is not displayed. The callback block method "contentUpdateCallback" was called back twice.

nnhubbard/ZSSRichTextEditor,nnhubbard/ZSSRichTextEditor,nnhubbard/ZSSRichTextEditor