Added JetBrains project files.

.editorconfig

@@ -0,0 +1,16 @@
+[*]
+charset=utf-8
+end_of_line=lf
+trim_trailing_whitespace=false
+insert_final_newline=false
+indent_style=space
+indent_size=4
+
+[{.babelrc,.stylelintrc,.eslintrc,jest.config,*.bowerrc,*.jsb3,*.jsb2,*.json}]
+indent_style=space
+indent_size=2
+
+[{*.yml,*.yaml}]
+indent_style=space
+indent_size=2
+