Added basic test and structure for file download
Introduced file download
Code reviewed
Reintroduced items() coverage
Added read test for ATS
Removed needless enable command for ATS
Added tftpy module
Added basic infrastructure for TFTP server
TFTP server functionality introduced
Extended TFTP server to update() method
Fixed blocking thread issue
Port 69 issue overcome: introduced server parameter
Code reviewed
Remote TFTP server added
Removed regular expressions, improved code readability
Updated documentation (TFTP server address, file content)
Fixed empty file creation, device test checks, memory occupation on device issue
Fixed error in delete() call
Added file download and related test
Improved test session