* Add lmod_package_path option to override what was previously hardcoded into the templates
* Add set_default_module parameter that can be used to disable the default module functionality (previously done by setting default_module to false)
* Add avail_styles parameter which is used to set LMOD_AVAIL_STYLES (Lmod 5.7.5)
* Add parameter type validations
* Remove acceptance rake task in favor of using the beaker task provided by puppetlabs_spec_helper
* Update unit tests
* Update README
* Replace Modulefile with metadata.json