remove commented out mdi gem group
remove commented out :debug_log_receive feature
change queue autoload to normal requires

also move multi_json require from receive to queue class
change to jruby 1.7.4, and bundle update to latest core and support
bundle update, primarily for core and support
remove a new line
change travis/log/aggregate.rb to be a class and not a script

this brings it in line with receive.rb
update the bin script for aggregation to reference the right class to preload
Merge branch 'master' into jk_jruby_1_7_4
run tests against 1.7.4