AzureStor 2.0.1

Display a progress bar when downloading single files. To turn this on or off, call options(azuure_dl_progress_bar=TRUE|FALSE).
Fix upload_to_url/download_from_url bugs introduced in last update.

AzureStor 2.0.0

Support authentication via Azure Active Directory tokens for blob and ADLSgen2 storage.
Support uploading and downloading to in-memory R objects, without having to create a temporary file. Uploading can be done with src a rawConnection or textConnection object. For downloading, if dest is NULL, the downloaded data is returned as a raw vector, or if dest is a rawConnection, in the connection object. See the examples in the documentation.
Implement parallel file transfers using a background pool of R processes. This can significantly speed up transfers when working with multiple small files.
Experimental support for using the Microsoft AzCopy commandline utility to perform file transfers. Set the argument use_azcopy=TRUE in any upload or download function to call AzCopy rather than relying on internal R code. The call_azcopy function also allows you to run AzCopy with arbitrary arguments. Requires AzCopy version 10.
New generics for storage operations:
- storage_container, create_storage_container, delete_storage_container, list_storage_containers for managing containers (blob containers, file shares, ADLSgen2 filesystems)
- storage_upload, storage_download, storage_multiupload, storage_multidownload for file transfers
- list_storage_files, create_storage_dir, delete_storage_dir, delete_storage_file for managing objects within a container

Add ADLS upload/download support to upload_to_url and download_from_url.
Set default blocksize for upload_azure_file to 4MB, the maximum permitted by the API (#5).
Allow resource group and subscription accessor methods to work when AzureStor is not on the search path.