Adding an Application section to Algorithm Table in README.md

Should we have an application section for every implemented algorithm on this repository, which will help others (one who don't know about that particular algo) to figure out, how and where this algorithm will help them and will keep them interested.
For eg :

## Implemented Algorithms

| Algorithm | C | CPP | Java | Python | Golang | Applications |
|:--------------|:----------------:|:----------------:|:----------------:|:-----------------:|:-----------------:|-----------------:|
| [Modular Exponential](http://www.geeksforgeeks.org/modular-exponentiation-power-in-modular-arithmetic/) | [\[X\]](https://github.com/iiitv/algos/blob/master/modular_exponential/modular_exponential.c) | | [\[X\]](https://github.com/iiitv/algos/blob/master/modular_exponential/ModularExponential.java) | [\[X\]](https://github.com/iiitv/algos/blob/master/modular_exponential/modular_exponential.py) | | [Efficient RSA-breaking Algorithm](https://crypto.stackexchange.com/questions/12513/solve-a-modular-exponentiation) |

Start by reviewing README.md, especially the Implemented Algorithms table and the modular exponential example in the issue. Determine how an Applications column should cover every listed algorithm and what links or descriptions are appropriate. Done means the README consistently includes useful application information for each implemented algorithm.

Written by the indexing model from the issue text.