Document agreed Java guidelines to README.md

[npathai]

To keep the things in sync and properly formatted we need to follow some style guide.
My vote is for Google Style Guide as it is used in many open source projects. Other option is to follow Oracle coding convention.

Google Style guide configuration for IDE

• Eclipse configuration
• IntelliJ configuration

Tasks to complete

• Add agreed guideline in How to contribute section
• Provide links to IntelliJ and Eclipse configurations for the same

[iluwatar]

I can live with the Google guide.

[iluwatar]

Maybe we can change this issue title to document the agreed conventions to README.md

[npathai]

@iluwatar I have changed the title. Should we target formatting existing pattern implementations with this issue?

[iluwatar]

I think we should. But this can be another task.

[npathai]

@iluwatar Sure. Maybe I will be able to squeeze in some time this weekend for it.