Fix shortcode issue on front page

[jdromero88]

I had to write a custom excerpt function to be able to make this work. I got the inspo from here.

I also tried this in the shortcodees.php but didn't work.

add_filter('the_excerpt', 'shortcode_unautop');
add_filter('the_excerpt', 'do_shortcode');
add_filter('get_the_excerpt', 'shortcode_unautop');
add_filter('get_the_excerpt', 'do_shortcode');

[jdromero88]

Closes #84