fix(install): Skip the 0th arg as it is the script name

[BYK]

Fixes #656.

[BYK]

/cc @ktosiek as this was introduced in #615.

[joshuarli]

${@:1} is kind of a special case of bash-specific substring expansion ${parameter:offset} where bash arrays are treated specially, I had to look this up myself. I'd suggest this to make it more readable, your choice though.

Suggested change

	while [[ -n "${@:1}" ]]; do
	shift # throw away $0
	while [[ -n "$@" ]]; do

[ktosiek]

The problem seems to actually be with getopt - I've assumed GNU getopt, and MacOS uses a simpler BSD getopt. I'll prepare a patch removing the getopt call - there's only one short option anyway, and it should make the code simpler.

It's not a problem with "$@" - bash manual says "$@ Expands to the positional parameters, starting from one." https://www.gnu.org/software/bash/manual/bash.html#index-_0040 - which means getopt shouldn't get the $0, and shouldn't pass it to load_options.

Edit: fixed in #660.

[BYK]

Closing in favor of #660