Added editorconfig file

See http://editorconfig.org/ for more info...

If you're using an editor that supports _editorconfig_, the editor's
settings for indentation, line endings, etc. should automatically adjust
when editing files.

.editorconfig

@@ -0,0 +1,14 @@
+# EditorConfig is awesome: http://EditorConfig.org
+
+root = true
+
+[*]
+indent_style = space
+indent_size = 2
+end_of_line = lf
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true
+
+[*.md]
+trim_trailing_whitespace = false