Update gems
Remove deprecation warning to #sum method using #map

Message like:

    DEPRECATION WARNING: Calling #sum with a block is deprecated and will be
    removed in Rails 4.1. If you want to perform sum calculation over the
    array of elements, use `to_a.sum(&block)`. (called from revenues_sum at
    /home/dmitry/Developer/dmitrynix/organize-app/app/helpers/moviments_helper.rb:9)