added import for send_file
changed return from read to sed_file in download function
changed assert on received data
test for download image
test for download mp3
added fake file in user_data.json
image and mp3 path for test
added img and mp3 in config file
added png and mp3 files
audio sample for test
Merge pull request #65 from stefanobazzi/getReFix

Get re fix