Adds function adls_append() to append a file.
Adds functions adls_open_to_text() and adls_open_to_file() to wrap/augment adls_open_to_raw().
Adds function adls_open_to_raw() to read a file and return raw data.
Adds function adls_rename() to rename a file or directory.
Adds function adls_delete() to delete a file or directory.
Adds function adls_list_status() to list a directory.
Adds function adls_mkdirs() to make a directory.
Adds adls S3 class to contain base-URL and token, uses adls() as constructor.
Adds function adls_url() to compose the base URL.
Adds a NEWS.md file to track changes to the package.