Added fileCopy to File provider to simulate file upload
Updated readme for fileCopy
Check if source and target directories exist and using Uuid provider
Readme corrections for File provider
Allowing empty parameters for File:file() provider
Removed phpDoc from readme
File provider - Check for return value of copy instead of a second call
Merge pull request #279 from stefanosala/feature/fileCopy

Added fileCopy to File provider to simulate file upload