Added editor configuration

.editorconfig

@@ -0,0 +1,13 @@
+# editorconfig.org
+
+root = true
+
+[*]
+charset = utf-8
+indent_size = 4
+indent_style = space
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+[*.md]
+trim_trailing_whitespace = false

.gitignore

@@ -1,4 +1,4 @@
 build
 composer.lock
 docs
-vendor
+vendor