Add a proper .gitignore file

[hyperpostulate]

With current .gitignore file, the output files (e.g. .class files, etc.) are also included in your every commit. This causes large commits, and time waste, especially when internet connection is limited.)

Please consider modify .gitignore file to exclude output files in further commits. You can use proper (hint: related to java) .gitignore file in the https://github.com/github/gitignore repository.