Add an EditorConfig definitions file.

Change-Id: Iccb35a1b0563f80b0014b0ade38053659cbfedae
diff --git a/.editorconfig b/.editorconfig
new file mode 100644
index 0000000..9af3800
--- /dev/null
+++ b/.editorconfig
@@ -0,0 +1,32 @@
+# https://editorconfig.org/
+
+root = true
+
+[*]
+end_of_line = lf
+insert_final_newline = true
+charset = utf-8
+
+[*.md]
+indent_style = space
+indent_size = 2
+
+[*.py]
+indent_style = space
+indent_size = 4
+
+[*.sh]
+indent_style = tab
+tab_size = 8
+
+[*.yaml]
+indent_style = space
+indent_size = 2
+
+[setup.cfg]
+indent_style = space
+indent_size = 4
+
+[tox.ini]
+indent_style = space
+indent_size = 2