Fix error: can't copy 'README': doesn't exist or not a regular file

[Hani-K]

Since README was modified in commit 74ba7c7 it doesn't install properly through setup.py

Without the fix:

running install
running build
running build_py
running build_scripts
copying and adjusting sslstrip/sslstrip -> build/scripts-2.7
running install_lib
running install_scripts
copying build/scripts-2.7/sslstrip -> /usr/local/bin
changing mode of /usr/local/bin/sslstrip to 755
running install_data
error: can't copy 'README': doesn't exist or not a regular file

With the fix:

running install
running build
running build_py
running build_scripts
copying and adjusting sslstrip/sslstrip -> build/scripts-2.7
running install_lib
running install_scripts
copying build/scripts-2.7/sslstrip -> /usr/local/bin
changing mode of /usr/local/bin/sslstrip to 755
running install_data
copying README.md -> /usr/local/share/sslstrip
running install_egg_info
Removing /usr/local/lib/python2.7/dist-packages/sslstrip-0.9.egg-info
Writing /usr/local/lib/python2.7/dist-packages/sslstrip-0.9.egg-info
Cleaning up...

[zerstoeren]

Thanks for sending up this PR. I was about to push this fix as well.

[Didan974]

+1