Merge pull request #3 from gseok/master

Code sync and 'renameDocument' fixed
Merge pull request #4 from gseok/master

[Title] Added 'mocha' TEST enviroment and sample code
Merge pull request #5 from gseok/master

[Title] Added 'testem' auto test env setting
Merge pull request #6 from gseok/master

[Title] Added 'addUser' skeleton code And test code, Fixed testem settin...
Modified typo. Modified api name to checkDocumentUrl from checkoutDocumentUrl.
Refactoring saveDocument and renameDocument.
[Title] searchDocument
[Desc ] add api
Merge pull request #7 from yeongtaik/master

[Title] searchDocument
Bugfixed getDocument, getDocumentTree. Refactoring all apis to validate input params.
Refactoring to send return code and return message. Modified to return after sending response.
Refactoring apis to use getCollection.
Merge pull request #4 from s1ddh1k/master

Code sync