Merge pull request #131 from deepakinseattle/master

Fix --rake when output to file(s)

fixes #130

lib/brakeman/brakeman.rake

 namespace :brakeman do
 
   desc "Run Brakeman"
-  task :run, :output_file do |t, args|
+  task :run, :output_files do |t, args|
     require 'brakeman'
-    
-    Brakeman.run :app_path => ".", :output_file => args[:output_file], :print_report => true
+
+    files = args[:output_files].split(' ') if args[:output_files]
+    Brakeman.run :app_path => ".", :output_files => files, :print_report => true
   end
 end