Fix some gemspec issues.

compass.gemspec

@@ -1,5 +1,5 @@
 $: << "#{File.dirname(__FILE__)}/lib"
-require 'compass'
+require 'compass/version'
 
 Gem::Specification.new do |gemspec|
   gemspec.name = "compass"

lib/compass.rb

@@ -6,13 +6,6 @@ end
 end
 
 module Compass
-  extend Compass::Version
-  def self.const_missing(const)
-    # This avoid reading from disk unless the VERSION is requested.
-    if const == :VERSION
-      version[:string]
-    end
-  end
   def base_directory
     File.expand_path(File.join(File.dirname(__FILE__), '..'))
   end

lib/compass/version.rb

@@ -45,4 +45,13 @@ module Compass
       end
     end
   end
+  extend Compass::Version
+  def self.const_missing(const)
+    # This avoid reading from disk unless the VERSION is requested.
+    if const == :VERSION
+      version[:string]
+    else
+      super
+    end
+  end
 end