* Cherry-pick from Kouji Takao's branch. 	commit 133c44c61da8b1057a6883e95a9165815f163cb4 	Author: Kouji Takao <kouji@takao7.net> 	Date:   Sun Jan 2 20:42:40 2011 +0900
* Cherry-pick from Kouji Takao's branch.
	commit 133c44c61da8b1057a6883e95a9165815f163cb4
	Author: Kouji Takao <kouji@takao7.net>
	Date:   Sun Jan 2 20:42:40 2011 +0900

	    display chapter name.

	commit 35b65a3e13463c54e696c71b6ec92d9c04a036df
	Author: Kouji Takao <kouji@takao7.net>
	Date:   Sun Jan 2 20:38:47 2011 +0900

	    supported book configuration in config.rb.

	commit 0c493c434bda7bc5b58d5927cc8caedb8da5105c
	Author: Kouji Takao <kouji@takao7.net>
	Date:   Sun Jan 2 20:37:56 2011 +0900

	    supported comment in CHAPS file.

krororo/review,orangain/review,murashitas/review,kmuto/review,kmuto/review,kuad9/review_study,takahashim/review,kmuto/review,orangain/review,krororo/review,masawada/review,suzuki/review,suzuki/review,kuad9/review_study,krororo/review,murashitas/review,takahashim/review,masawada/review