Enforce consistent coding styles across different IDEs

.editorconfig

@@ -0,0 +1,11 @@
+# Unix-style newlines with a newline ending every file
+[*]
+end_of_line = lf
+insert_final_newline = true
+max_line_length = 120
+trim_trailing_whitespace = true
+
+# 2 space indentation
+[*.rb]
+indent_style = space
+indent_size = 2