* Add support for declaring arguments as repeatable
If the usage of the argument includes the phrase "Can be repeated.",
the corresponding arg_ variable will be an array containing one element
per instance of the argument.
* Add example and test for using repeated parameters
* Add example and test for using repeated flags
moved entries in changelog from `unreleased` to 2.1.0 (even
though technically it's too late for that since that version was already
released).
added new section for 2.2.0 and added some points on what changed.
bumped version to 2.2.0 in main.sh, example.sh and package.json
Closes#74
* install shellcheck from debian sid repository
* cleanup acceptance shell script
use a uniq temp directory and cleanup
make sure commands we use/need are installed
* shellcheck main.sh
* shellcheck example.sh
* shellcheck test/acceptance.sh
* brace all variables, used [[ instead of [
If main.sh is being sourced instead of being executed it respects the
variables __usage and __helptext being defined beforehand. Its behaviour
will depend on the sourcing script. If __usage is defined but empty no
argument parsing is done. If __helptext is defined but empty no helptext
will be shown.
Logging support still exists as it did before. The environment variables
LOG_LEVEL and NO_COLOR are supported just as they were before.
