modified 'nbtoc.py' to auto download the 'js' and 'html' dependencies when running %install_ext
modified 'nbtoc.py' to auto download the 'js' and 'html' dependencies when running %install_ext

danielballan/ipython_extensions,dekstop/ipython_extensions,minrk/ipython_extensions,NunoEdgarGub1/ipython_extensions,minrk/ipython_extensions,minrk/ipython_extensions,NunoEdgarGub1/ipython_extensions,danielballan/ipython_extensions,dekstop/ipython_extensions,danielballan/ipython_extensions,dekstop/ipython_extensions,NunoEdgarGub1/ipython_extensions