Add README for Java binding.
Add README for Java binding.

johnfraney/editorconfig-vim,benjifisher/editorconfig-vim,VictorBjelkholm/editorconfig-vim,VictorBjelkholm/editorconfig-vim,benjifisher/editorconfig-vim,johnfraney/editorconfig-vim,benjifisher/editorconfig-vim,pocke/editorconfig-vim,VictorBjelkholm/editorconfig-vim,pocke/editorconfig-vim,johnfraney/editorconfig-vim,pocke/editorconfig-vim