* adjust the createPreviewLink function.
Merge branch 'master' of github.com:xirang/chanzhieps
 * rm unused code.
 * modify relateUid to widget.
 * adjust the previewlink.
 * add xml namespace in html tag.
 * add button for sina share.
 * add share button.
Merge branch 'master' of github.com:xirang/chanzhieps