Make sure that the .sheepsafe dir exists before doing anything.

lib/sheepsafe/installer.rb

@@ -5,6 +5,7 @@ class Installer
     attr_reader :config, :network, :controller
 
     def initialize(config = nil, network = nil, controller = nil)
+      check_config_path
       require 'highline/import'
       @config  = config  || (File.readable?(Sheepsafe::Config::FILE) ? Sheepsafe::Config.new : Sheepsafe::Config.new({}))
       @network = network || Sheepsafe::Network.new(@config)
@@ -22,6 +23,12 @@ def install
       announce_done
     end
 
+    def check_config_path
+      if !File.directory? "#{ENV['HOME']}/.sheepsafe/"
+        Dir.mkdir("#{ENV['HOME']}/.sheepsafe/")
+      end
+    end
+
     def intro_message
       say(<<-MSG)
 Welcome to Sheepsafe!