[Feat. Req.] Support to read request from file

[AdityaIndoori]

Often in SQLMap, I just copy the entire request to a file. I use:
python sqlmap.py -r requestFile.txt
to begin the attack.

Having such a feature would be great. Is there a feature like that for TPLMap?
Also, what if the post requests are JSON?

[hax0rgb]

@epinna This is going to be super helpful. Any idea when can we see this getting implemented?

[ASecurityPro]

@epinna This is a good idea and will be helpful