WordPress Coding Standards optimizations.
Use an list for the post types.
Use the checked() function.
No need to set by default, get_option will return false if option does not exist.
Moved the visualRefresh setting to Site.php and only set this var in the init routine.
Use __return_false as section callback, we don't output anything.
Spacing
Removed saveOptions, no longer used.
Moved the uninstall method to an uninstall.php file, much easier and cleaner.