Fix download model binary script to get correct lines on parsing table

Fix download model binary script to get correct lines on parsing table

The base reference of "bottom" variable was relative to the "top+1" and
not to the whole readlines output. It ended up without all the lines.

That could work for some gists however for the model I was looking for (see
below) the sha1 key was not being parsed, as it was missing the last line.

tested with the following gist:
longjon/1bf3aa1e0b8e788d7e1d