minor refactor: use singular form for model filename

- because we're modeling a *single* Stand w/ this file.
whitespace
totalDistributed is now always returned from the API

- so we don't need to calculate it on the frontend.
- see commit: 43628973d8089d04929f2f2969d0c2f3e4b72a42
simplify frontend code now that backend retuns aggregate stats

- Thanks to commit 43628973d8089d04929f2f2969d0c2f3e4b72a42 we always have aggregate stats to pull from
fixed a typo

- properties available to handlebars are those which are defined in the
  `view` object from views/stands/show.js, and `description` isn't one of those,
   but instead we should access `stand.description' since that is really accessing
   the `description` property of `model.attributes`.
move daySinceUpdated logic from view to model

- I’m assuming daysSinceUpdated and daysSinceChecked
  are synonymous.
remove duplicate code

- app.’s provides a `daysSince` helper function which we can use
  instead of the daysSinceChecked function in stand.js
further simplifications of template’s view object
removing apparently unused code
refactor: simplification of stand templating

- use model attributes directly as template view obj
refactor: moved stands meta info from view's render to model

- I wanted to move logic out of the view code
- the new way of doing things maybe looks a little cleaner
Merge pull request #72 from drewrwilson/misc/various-refactoring

various refactoring