added editorconfig setup (#1037)

.editorconfig

+# EditorConfig helps developers define and maintain consistent
+# coding styles between different editors and IDEs
+# editorconfig.org
+
+root = true
+
+[*]
+indent_style = space
+indent_size = 4
+end_of_line = lf
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true
+
+[Makefile]
+indent_style = tabs
+indent_size = 4
+
+[Vagrantfile]
+indent_size = 2
+
+[*.rb]
+indent_size = 2
+
+[*.py]
+indent_style = tabs
+
+[*.js]
+indent_size = 2
+