TypeError in `readable_time` when watching file with target size

[normanr]

speedometer/speedometer.py

Line 943 in 890df21

new_out = new_out + value + suf

   new_out = new_out + value + suf
              ~~~~~~~~^~~~~~~
TypeError: can only concatenate str (not "int") to str

Can be fixed by doing: new_out = new_out + str(value) + suf