Create .editorconfig (#36)

Author: staabm

.editorconfig

@@ -0,0 +1,17 @@
+; top-most EditorConfig file
+root = true
+
+; Unix-style newlines
+[*]
+charset = utf-8
+end_of_line = LF
+insert_final_newline = true
+trim_trailing_whitespace = true
+indent_style = space
+indent_size = 4
+
+[*.md]
+max_line_length = 80
+
+[COMMIT_EDITMSG]
+max_line_length = 0