Merge pull request #10 from voltrue2/develop

cluster mode management refactored
Merge branch 'master' of https://github.com/voltrue2/GraceNode
Merge branch 'develop'
Merge pull request #11 from voltrue2/develop

Develop
Merge pull request #12 from voltrue2/develop

log module can also log data into mongodb
Merge branch 'develop'
Merge branch 'master' of https://github.com/voltrue2/GraceNode
Merge branch 'develop'
Merge pull request #13 from voltrue2/develop

bug fix mysql module was not releasing the connection back to the pool o...
Merge pull request #14 from voltrue2/develop

Develop
Merge pull request #15 from voltrue2/develop

Develop
Merge branch 'develop'
Merge branch 'master' of https://github.com/voltrue2/GraceNode
Merge pull request #16 from voltrue2/develop

Develop
Merge branch 'develop'
Merge branch 'master' of https://github.com/voltrue2/GraceNode
Merge pull request #17 from voltrue2/develop

Develop
Merge pull request #18 from voltrue2/develop

iap module now returns response body of purchased item
Merge pull request #19 from voltrue2/develop

typo fixed
Merge pull request #21 from voltrue2/develop

Develop