more efficient arguments passing
list comprehension changed into a simple loop
multi-page previews
previews: row count calculated from terminal height
README updated
Merge branch 'multiple-pages' into devel

+ multiple image pages shown when there are too many images to display
added required setopts (extended_glob)
README updated
cleanup
docstring updated
zsh 'emulation' mode enabled for better compatibility with custom configs
typo
a hack for better reliability of modify-current-argument

In fact, I'm wondering why did it work most of the time.