Added new method for getting files which are shared with the community.
message addition for community files.
Merge branch 'master' into CommunityFiles
removed the method from community service. This method can be used
directly from file Service. Also added an overloaded method for this in
File Service with no params.
Merge branch 'master' into CommunityFiles
modified sample to use the methods from File Service.
Merge pull request #759 from VimalDhupar/CommunityFilesFS

Community files fs