extract common block of animal item

 the `index.html` and `page.html` page have shared template block which represented as animal item.
 extract it to a separated template file `brick.html` for better maintenance
fix root of image path of animal item

 the variable `{{ MEDIA_URL }}` is not available on ajax-loading page `page.html`,
 use hardcoded one, `/static/media`, instead.
#16 use normalized phone number in tel protocol
Merge branch 'master' of https://github.com/jsleetw/petneed.me