* Solved weird problems with xcopy. The /EXCLUDE option of xcopy cannot except a file with space it's path nor will it except a quoted path. So the excludes file is copied to each and every target folder during the copy stage.
* New variables: XCOPY_EXCLUDE_FILE_NAME, XCOPY_EXCLUDE_FILE_PATH to overcome xcopy limitations.
* New copy tools methods begin_copy_folder, end_copy_folder  to overcome xcopy limitations.