Add a generic wrapper function for file uploads, instead of calling directly
the simple upload function or the chunked upload function
Add support for directory uploading
Add generic db_upload wrapper
Updated
Add directory download function
Update README.md
Update README.md
Allow uploading if the remote directory already exists
Merge pull request #59 from poppen/feature/allow_remote_dir_exists

Allow uploading if the remote directory already exists
Add missing -f option in usage
Add redirection of curl errors
Improved error messages
Improved grep syntax
Fix checking for FILE_DST in download function
Add function to check the cURL exit code
Improved messages output
Fix minor problem with file_download message
Removed trailing spaces and added massage for shared link
Changed from VERBOSE to QUIET mode
Add new command line options: -q -d -k