Untested rewrite of STS class
Fixes wrong assertion (Protocol Version)
Fix Footer checking (length was wrong)
Add md5 checking (gracefully continue on error)
Ensure Footer format is little endian
Fix footer byte order
Fix single value struct unpack (always returns a tuple)
Fix usb_timeout when response size is not a multiple of 64
Remaining Bytes correction

With the first packet we already load 20 bytes of the payload data!
Remove accidentally introduced bug
Spectrum() fix numpy vstack syntax
Version Bump

STS now tested and supported