Fixes issue #39
ZSH's default globbing behaviour differs from Bash. If there is no
match, ZSH itself will print the error message.
This means that piping a commantd's STDERR to /dev/null will not
hide it.
By unsetting the NOMATCH option we get a behaviour similar to Bash.
Signed-off-by: Tomas Sedovic <tomas@sedovic.cz>
