Fix directory watcher

Directory watcher used to upload a file only if a file was added. Now it will upload recursively files whan an event occurs

Fixes recursive file iterator

• Can upload at start if delete file parameter is true
• Now can handle recursive files in folders but needs Python > 3.5

Availability to remove uploaded file

add availability to remove file on upload if third parameter is true

Fixes download pathes

Fixes download pathes when file name contains a slash in it

added Downloader

• can download musics
• can upload musics
• ???
• profit