Add to Git what was in Subversion.
Add to source control.
Add ProfileHtmlSourceToImageUrlFunction.
Use URL (rather than a URL spec as a String) as soon as possible.
Add DownloaderImpl to source control.
Add unit tests for PlayerPhotoDownloaderImpl class.
Do not perform parameter validation in package-private classes.
Remove unused dependencies from pom.xml.
Add unit tests for PlayersSupplier class.
Add PlayersSupplierTest to source control.
Add unit tests of ProfileUrlToImageUrlFunction class.
Do not download photo if output file already exists.