Export app object from app.js
Render title for resort and tag pages
Center resort pages

Reduce max-width of the content for pages with less than 5 resorts. In
this way content appears centered.
Tags are also centered but we allow them to be 1 column wider than
resort content. That may require adjustment once we have more tags.
Capability of decorating resort header

Application can define decorateResort function
Merge branch 'title'
Release 1.2.1