academicpages#1975 cleaning up the gem files a bit

.gitignore

@@ -1,5 +1,6 @@
-# Ignore the contents of the _site directory
+# Ignore the contents of the _site directory and other cache directories
 _site/
+.sass-cache/
 
 # Ignore the directory for local files during development
 local/

Gemfile

@@ -1,28 +1,10 @@
 source "https://rubygems.org"
 
-# Hello! This is where you manage which Jekyll version is used to run.
-# When you want to use a different version, change it below, save the
-# file and run `bundle install`. Run Jekyll with `bundle exec`, like so:
-#
-#     bundle exec jekyll serve
-#
-# This will help ensure the proper Jekyll version is running.
-# Happy Jekylling!
-
-gem "github-pages", group: :jekyll_plugins
-
-# If you want to use Jekyll native, uncomment the line below.
-# To upgrade, run `bundle update`.
-
-# gem "jekyll"
-
-gem "wdm", "~> 0.1.0" if Gem.win_platform?
-
-# If you have any plugins, put them here!
 group :jekyll_plugins do
-  # gem "jekyll-archives"
+  gem "jekyll"
   gem "jekyll-feed"
   gem 'jekyll-sitemap'
-  gem 'hawkins'
   gem "webrick", "~> 1.8"
 end
+
+gem "github-pages"