Add .editorconfig

Author: auxten

.editorconfig

@@ -0,0 +1,19 @@
+# See http://editorconfig.org
+
+[*]
+end_of_line = lf
+insert_final_newline = true
+charset = utf-8
+
+# For non-go files, we indent with two spaces. In go files we indent
+# with tabs but still set indent_size to control the github web viewer.
+indent_size=4
+
+# Override default spacing rules for .opt files.
+[*.opt]
+indent_style = space
+indent_size = 4
+
+# Makefiles are broken without using actual tabs for indentation.
+[Makefile]
+indent_style = tab