Added an editorConfig

Author: csharpfritz

.editorconfig

@@ -0,0 +1,14 @@
+root = true
+
+[*]
+end_of_line = crlf
+indent_style = tab
+indent_size = 2
+trim_trailing_whitespace = true
+insert_final_newline = true
+
+[*.cs]
+csharp_style_var_for_built_in_types = true:error
+csharp_style_var_when_type_is_apparent = true:error
+csharp_style_var_elsewhere = true:error
+csharp_prefer_braces = true