be less picky about keys for s3.objects.all(options), and CGI.escape the values passed to the call

lib/fog/aws/models/s3/objects.rb

@@ -15,7 +15,7 @@ module Fog
         def all(options = {})
           collection = bucket.collection.get(
             bucket.name,
-            options.reject {|key, value| !['delimiter', 'marker', 'max-keys', 'prefix'].include?(key)}
+            options
           )
           collection && collection.objects
         end

lib/fog/aws/requests/s3/get_bucket.rb

@@ -39,7 +39,7 @@ unless Fog.mocking?
           end
           query = ''
           for key, value in options
-            query << "#{key}=#{value};"
+            query << "#{key}=#{CGI.escape(value).gsub(/\+/, '%20')};"
           end
           query.chop!
           request({