Revert "compare actual files rather than file paths"

This reverts commit beecdfdf51d0b5738c303a717254e1f376be19e3.
compare absolute paths rather than relative paths

Changed from using os.stat which is looking to see if files are
identical. May still have strange overwriting of files in some cases,
abspath comparison should avoid any strange conflicts more consistently.
0777 permission

Reverting back to default 777 permissions, some files were inheriting
strange permission settings from their source files (particularly when
using torrents) that caused permission errors when tagging was
attempted.