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

(mef)