[Command Line] Store sass cache files in the sass directory of the project. Closes GH-8.

.gitignore

@@ -2,8 +2,10 @@
 tmp/*
 examples/*/stylesheets/*
 examples/*/*.html
+examples/*/src/.sass-cache
 test/tmp
 test/fixtures/stylesheets/*/tmp
 test/fixtures/stylesheets/*/saved
 test/fixtures/stylesheets/empty
+test/fixtures/stylesheets/*/sass/.sass-cache
 pkg/*

lib/compass/actions.rb

@@ -64,7 +64,8 @@ module Compass
                                     :line_comments => options[:line_comments],
                                     :style => options[:style],
                                     :css_filename => css_filename,
-                                    :load_paths => options[:load_paths])
+                                    :load_paths => options[:load_paths],
+                                    :cache_location => options[:cache_location])
         css_content = engine.render
         write_file(css_filename, css_content, options.merge(:force => true))
       else

lib/compass/compiler.rb

@@ -10,6 +10,7 @@ module Compass
       self.from, self.to = from, to
       self.logger = options.delete(:logger)
       self.options = options
+      self.options[:cache_location] ||= File.join(from, ".sass-cache")
     end
 
     def sass_files