add directory to store experimental results and reviews

[goyalpramod]

A directory with the guidelines on how to contribute to each has been mentioned and created, kindly go through it and mention if any redundant information has been provided or if anything has been missed.

[ChakshuGautam]

Should we call the folder literature_review?

[goyalpramod]

Should we call the folder literature_review?

Sure thing, I'll change it to that.

[goyalpramod]

@ChakshuGautam kindly check