Added guard-symlink dependency for development purposes.

Gemfile

@@ -109,6 +109,9 @@ group :development, :test do
   gem 'rack-livereload'
   gem 'rb-fsevent',        require: false
 
+  # auto symlinking
+  gem 'guard-symlink', require: false
+
   # code QA
   gem 'pre-commit'
   gem 'rubocop'

Gemfile.lock

@@ -153,6 +153,8 @@ GEM
       guard (~> 2.8)
       guard-compat (~> 1.0)
       multi_json (~> 1.8)
+    guard-symlink (0.1.0)
+      guard-compat (~> 1.1)
     hashdiff (0.3.2)
     hashie (3.4.4)
     htmlentities (4.3.4)
@@ -445,6 +447,7 @@ DEPENDENCIES
   github_changelog_generator
   guard
   guard-livereload
+  guard-symlink
   htmlentities
   icalendar
   json