-o tag to specify open after download

[pandusonu2]

In case of multiple chapter download, becomes too much of hassle if over 20 pdf's open within short intervals of time.
Therefore need to add a specifier whether to open the documents after download or not.

[pandusonu2]

How to do it?
-> Read the argument list while executing and open the chapter after download only if "-o" is one of the argument.