Fix caffemodel_to_t7.lua

[rtqichen]

Thanks for providing these scripts! Just a couple small fixes: lua comments, and variable references. Had to clone the network outputs or the tests weren't passing.

[ProGamerGov]

This pull request solves the issue of:

ubuntu@ip-Address:~/test_models$ th caffemodel_to_t7.lua
/home/ubuntu/torch/install/bin/luajit: caffemodel_to_t7.lua:8: unfinished string near '"'
stack traceback:
        [C]: in function 'dofile'
        ...untu/torch/install/lib/luarocks/rocks/trepl/scm-1/bin/th:150: in main chunk
        [C]: at 0x00405d50