twentyeleven_setup should use get_template_directory() instead of __FILE__

[TomAuger]

Since this is a pluggable function, which would be over-ridden in the child theme's directory, and since we want to make it as easy as possible for new developers to extend the parent theme, consider

require( get_template_directory() . '/inc/theme-options.php' );
require( get_template_directory() . '/inc/widgets.php' );

instead of using

require( __FILE__ . '/inc/theme-options.php' );
require( __FILE__ . '/inc/widgets.php' );

FILE breaks the theme and throws errors the moment twentyeleven_setup is defined somewhere within the child theme's directory structure, whereas get_template_directory() will always point to TwentyEleven.

+1 for this change.

In [19289]:

Use get_template_directory() for include paths in Twenty Eleven, rather than FILE magic constant. Won't go stale when twentyeleven_setup() is overridden. props TomAuger, fixes #18985.