v0.1.3

Other

• Fix string descriptors with trailing junk and harden string reads

Fixed

• String descriptors end at the first NUL character. Some devices (an
  FT2232D clone here) declare a longer descriptor holding a NUL-terminated
  string followed by leftover EEPROM bytes, which came back as garbage
  appended to the serial number; Linux cuts at the NUL too.
• String reads follow the Linux kernel's recovery: if a device stalls the
  full-size request or answers it short, the 2-byte header is read and then
  exactly the declared length. A malformed or empty language table falls
  back to US English, and the language is read once per handle instead of
  before every string.
• The hardware tests no longer probe a nonexistent string index on every
  attached device: some FTDI clones stall all requests after that until
  they are reset. The check now runs only on the nominated bulk-IN device.