Removed out-of-date TODO item.
Ignore compiler warning.
Add RealPath() and IsDir() methods for the FilePath class.
Add FilePath::IsFile().
Add GetDirContents() method.
Make constant as such.
Add the ability to delete files and folders.
Use FILE_PATH_LITERAL for hard coded paths.
Add ScopedTempDir.
Rename set_current_game() to Initialize().
Make the Player implementations private.
Make the CommandHanlder implementations private.