Add .editorconfig

.editorconfig

@@ -0,0 +1,18 @@
+# EditorConfig is awesome: http://EditorConfig.org
+
+# top-most EditorConfig file
+root = true
+
+# Unix-style newlines with a newline ending every file
+[*]
+end_of_line = lf
+insert_final_newline = true
+
+# Tab indentation (no size specified)
+[*.{c,h}]
+indent_style = tab
+
+# 4 space indentation
+[*.md]
+indent_style = space
+indent_size = 4