perform a git add when doing a homesick track

lib/homesick.rb

@@ -112,6 +112,10 @@ class Homesick < Thor
       home_path = home_dir + file
       ln_s absolute_path, home_path
     end
+    
+    inside castle_path do
+      git_add absolute_path
+    end
   end
 
   desc "list", "List cloned castles"

lib/homesick/actions.rb

@@ -59,6 +59,11 @@ class Homesick
       system "git pull --quiet" unless options[:pretend]
     end
 
+    def git_add(file, config = {})
+      say_status 'git add file', '', :green unless options[:quiet]
+      system "git add #{file}" unless options[:pretend]
+    end
+
     def mv(source, destination, config = {})
       source = Pathname.new(source)
       destination = Pathname.new(destination + source.basename)