Assign genre `entry@zh-classical' instead of

Assign genre `entry@zh-classical' instead of
`morpheme-entry@zh-classical' and `sentence-entry@zh-classical'.
(concord-kanbun-add-sentence-entry): Use genre `entry@zh-classical'
instead of `sentence-entry@zh-classical'.
(concord-kanbun-add-morpheme-entry): Use genre `entry@zh-classical'
instead of `morpheme-entry@zh-classical'.
(concord-kanbun-add-morpheme): Use feature `->entry@morpheme' instead
of `->entry' to store entry object; if canonical-form is not equal to
entry, add feature `->entry@morpheme/canonical' to store
canonical-form.
(concord-kanbun-read-sentence): Add word-classes of morphemes into
morphemes in feature `=name'; use feature `->entry@sentence' instead
of `->entry' to store entry object for sentence.
(concord-kanbun-read-buffer): Display source-names and sentence-numbers.
(concord-kanbun-batch-read-file): New function.