Log Message:
Update 1.8 to 1.11
(from bash script itself):
------------------
#   v1.9 - 2015-02-12 11:50:00+0100
#       * documentation update
#       * fixing --preserve-root
#       * code cleanup
#   v1.10 - 2015-03-24 00:40:00+0100
#       + adding -d/--dir option (remove empty directory)
#       * updating some output messages
#   v1.11 - 2015-05-11 00:05:00+0200
#       * fixing deletion of invalid symlinks
#       * unifying quotations