formatting glitch fix: escape underscore

in the markdown the following line:

    ReduxFramework::$_url and ReduxFramework::$_dir 

would render as 

    ReduxFramework::$url and ReduxFramework::$dir

This is fixed by adding backslash before underscores like this:

    ReduxFramework::$\_url and ReduxFramework::$\_dir
Tiny formatting fix

each feature on it's own line
Merge pull request #207 from mikkelbreum/master

proper display of underscores (ReduxFramework::$_dir). Thanks @mikkelbreum.