Merge pull request #11 from linhnt/develop

update log for facebook
Merge pull request #12 from linhnt/develop

update
Merge pull request #13 from linhnt/develop

update
Merge pull request #14 from linhnt/develop

update
Merge pull request #15 from linhnt/develop

update
refs #12207 remove DB password for production env.
Merge pull request #16 from norifumi/task/12207

refs #12207 remove DB password for production env.
refs #12210 Remove config/databse.yml, create for each enviroments