Refactoring

 * Refactor MyGists::Fetch#gists and MyGists::Fetch specs to be more readable
 * Add MyGists::Fetch spec for getting star status
 * Add MyGists::Fetch::Options to encapsulate hash sent to MyGists::Fetch.for
   * Move methods from ProfileDecorator and MyGists::Fetch into MyGists::Fetch::Options class
 * Add scopes to Gist
   * Add specs for Gist scopes
 * Add GithubApiTestHelpers to make specs easier to read and cleaner
 * Refactor MyGists::Refresh spec to clearly express its intent
 * Move gist icon rendering logic from view into GistDecorator
 * On tags view, tighten gist icons to gist description and add whitespace between gist descriptions
 * SCSS cleanup by moving style declarations to correct asset files and use descriptive selectors
 * Correctly spell paginate
 * In Users::OmniauthCallbacksController, use ruby 1.9 syntax and make more readable by moving github hash into a local variable
 * Remove unused views and updated views to ruby 1.9 syntax
 * Refator Gist.public_null_for and Gist.last_touched_for to return an instance of a Gist instead of an Active::Record::Relation
 * Change default tag ordering to use slug, so ordering is applied to strings of the same case