Coding Style Guidelines

[rraks]

We need to have a standard set of guidelines regarding coding style.
For e.g, https://google.github.io/styleguide/javaguide.html
It need not be a publicly accepted one too, but we need to put the styles we follow somewhere.
Problems if we don't -

1. Git will unnecessarily diff changes in indentations if auto-formatting/opening file in an editor which auto-formats
2. Non-uniform readability
3. Doc-generation from code - I don't know if there are javadocs for current codebase, but these tools require a standard code style.

[pct960]

Sure, we can use something like Google's java formatter to automatically reformat the code to comply with Google's java code style.

Feel free to add these things to the doc and create a PR.