Implement Graph Coloring Algorithm

[shadowsaber16]

Implement greedyGraphColoring in a language of your choice.

Please read the contributing guidelines in CONTRIBUTING.md

Languages claimed/implemented:

• C
• C++
• Java
• Python
• Any other language

[codelixir]

Yes you can go ahead with it, assigning it to you.
I'd suggest you to put your code in a new directory named something like graphAlgos/

[LathikaDevraj]

Hey, can I claim the implementation of the algorithm in Java?

[codelixir]

@LathikaDevraj yes, you can go ahead!

[codelixir]

Merging #236 for python. Thanks @shadowsaber16!

[codelixir]

Merging #242 for java. Thanks @LathikaDevraj!

[codelixir]

Assigned C++ to @skywalker2207