Add support to encrypted ISO

fix compile errors and suppress minor warnings

strip minor bug fixes and cleanup

minor cleanup

minor cleanup

Fixed crash at boot parsing an ISO with a empty directory entry at file head

applied suggested changes

added missing break in switch

Update rpcs3/Loader/ISO.cpp

Co-authored-by: Megamouse <studienricky89@googlemail.com>

use hex_to_bytes() instead of self made functions

minor cleanup

rewrite nested if()

add explicit support to .key

minor cleanup

optimize partial sector read

minor optimization

fix conflict

Author: digant73