Bug #4, Make Ajax API calls work when clean URLs are NOT enabled

* Relates to WordPress 'permalink_structure' configuration option
* PHP function --  Evidence_Hub_Shortcode::print_api_url()
Bug #4, A bit of tidying in the PHP/HTML shortcode files
Merge pull request #5 from IET-OU/iet-ou/CR4/api-url

iet-ou/CR4/api-url: Make Ajax API calls work when clean URLs are NOT enabled..