Organize documents of installation.

1.Changed the CentOS version from CentOS6.4 to CentoOS6.5.
2.Added the procedure of install the qpid-cpp-client-devel.
3.The document(doc/install/ , doc/upgrade/) is integrated into the "website"(project-hatohol/website) .
I suggest the following sentence.
need to register a yum repository for installing