Update yardopts
Add --image-extract
Remove redundant routine
Add block to get_image_data
Add count_chunks method
Decrease read buffer
Don't initialize RC6 every decrypt call
Improve flash speed - write/read data in threads
Fix display bug
Add --tofes action
Cosmetic changes
Add part_by_name to MBR structure
Remove potentially dangerous checks
Add read by partition name (parameter --item)
Revise README
Remove unwanted debug line
Add write by partition name (parameter --item)
Revise README
Add legacy? check
Revert "Update libusb version to 0.5"

This reverts commit 72fd4ee402552a85452c1e209d626b69695b9a50.