File Proxy + File Upload and Download JS Changes
Change to make forceAuthentication method public so that it can be used
from FileProxy
change to make forceAuthntication public
Removing unwanted imports + create new file (not required)
Change to show download link with title
reverting change in ClinetService to make forceAuthentication public and
copied the code to file proxy
removed downloadFile function
Merge branch 'master' of https://github.com/OpenNTF/SocialSDK into JSFielUploadAndDownload
incorporated review comments and fixed issue with pin and unpin file
Merge pull request #275 from VineetKanwal1/JSFielUploadAndDownload

File Proxy + Js file upload and download changes