Completed the file selector

#1059
Creaqte readme for ssFileSelector
Merge remote branch 'upstream/master' into feature-FileUploader-1059
Update readme and cd errors
Merge remote branch 'upstream/master' into feature-FileUploader-1059
Udate reaD ME
Merge pull request #151 from AlecErasmus/feature-FileUploader-1059

File uploader