Add an .editorconfig

(The file was generated by exporting PhpStorm code style settings.)

.editorconfig

@@ -0,0 +1,15 @@
+[*]
+charset=utf-8
+end_of_line=lf
+insert_final_newline=false
+indent_style=tab
+tab_width=4
+
+[{phpunit.xml.dist,*.jhm,*.xslt,*.xul,*.rng,*.xsl,*.xsd,*.ant,*.tld,*.fxml,*.jrxml,*.xml,*.jnlp,*.wsdl}]
+indent_style=space
+indent_size=4
+
+[*.svg]
+indent_style=space
+indent_size=4
+