coursera-preview-download.sh

##Shoot the terminal-

##For mac users who **don't** have `wget` installed
##Run 

##To install homebrew -
ruby -e "$(curl -fsSL https://raw.github.com/mxcl/homebrew/go)"

##To install wget -

brew install wget

brew install lynx

##To install the Cousera preview videos-
sh coursera-preview-download.sh https://class.coursera.org/<course>/lecture/preview

##example:- 

sh coursera-preview-download.sh https://class.coursera.org/nlp/lecture/preview