Shrink a line longer than 80 characters

This makes use of some snazzy automatic type conversion!
Parse the output of the latest Chisel

There were two changes to Flo output in the latest Chisel version:
  * ' is used instead of / to designate widths.
  * Widths can be attached to constants in addition to opcodes.

This version can parse both the new file format and the old file
format.  Assuming there's no integration problems, it should be a
drop-in replacement for the previous version.
Update to the latest Chisel