Rename Document::Store to ::Shop

  - Rename Mandel::Document->_raw() to data()
  - Move templates around
  - Search&replace store => shop
  - Bumping deps
Add partial templates

  - Add partials/html_head and html_foot
  - Forgot to rename all /store/
Fix bugs and t/build.t

  - Fix collection() helper need to get core from $self
  - Remove App::Boutique::Util