Added MySQL tutorial & database textbook in ja.

Added MySQL tutorial & database textbook in ja.
These books are free to share with IPA license

IPA (http://www.ipa.go.jp/index-e.html)
Merge pull request #1083 from jinnaiyuu/patch-3

Added MySQL tutorial & database textbook in ja.
Merge pull request #1084 from sunxb10/master

update Chinese resources
Merge pull request #1 from vhf/master

update with vhf:master