Version 1.2.64 released

Fix some cases where the FileUtilities.getRelativePath method would return an incorrect result if the base directory is a root of the file system
Add a isRoot(File) method in the FileUtilities class to detect if a directory is a root of the file system
Add a new static method without a second boolean argument for createFromContext the in the ResourceLoader and the ResourceUILoader
Add the capability to use named variables in the MessageConstructor and MessageProvider classes