🔧 Add EditorConfig

Author: gluons

.editorconfig

@@ -0,0 +1,15 @@
+root = true
+
+[*]
+indent_style = tab
+indent_size = 4
+charset = utf-8
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+[*.md]
+trim_trailing_whitespace = false
+
+[{*.{coffee,cson,yml,yaml,jade,pug,rb,gemspec},{package,bower}.json,Rakefile,Gemfile}]
+indent_style = space
+indent_size = 2