Allow passing a path to the rails project instead of requiring the user to change into the rails project directory first.

lib/compass/commands/install_rails.rb

@@ -4,7 +4,8 @@ module Compass
   module Commands
     class InstallRails < Base
       def initialize(working_directory, options)
-        super(working_directory, options)
+        wd = options[:project_name] ? File.join(working_directory, options.delete(:project_name)) : working_directory
+        super(wd, options)
       end
       def perform
         set_install_location

lib/compass/exec.rb

@@ -69,13 +69,17 @@ module Compass
         self.opts = OptionParser.new(&method(:set_opts))
         self.opts.parse!(self.args)    
         if ARGV.size > 0
-          self.options[:project_name] = ARGV.shift
+          self.options[:project_name] = trim_trailing_separator(ARGV.shift)
         end
         self.options[:command] ||= self.options[:project_name] ? :create_project : :update_project
         self.options[:environment] ||= :production
         self.options[:framework] ||= :compass
       end
 
+      def trim_trailing_separator(path)
+        path[-1..-1] == File::SEPARATOR ? path[0..-2] : path
+      end
+
       def set_opts(opts)
         opts.banner = <<END
 Usage: compass [options] [project]