added DLang to EditorConfig

code/D/.editorconfig

@@ -0,0 +1,17 @@
+root = true
+
+[*.d]
+dfmt_align_switch_statements = true
+dfmt_brace_style = allman
+dfmt_outdent_attributes = true
+dfmt_outdent_labels = true
+dfmt_soft_max_line_length = 80
+dfmt_space_after_cast = true
+dfmt_space_after_keywords = true
+dfmt_split_operator_at_line_end = false
+end_of_line = lf
+indent_size = 4
+indent_style = space
+insert_final_newline = true
+max_line_length = 132
+tab_width = 8