[SpecHelper] Use coveralls head which fixes issues with colored

Gemfile

@@ -20,7 +20,7 @@ group :development do
   gem "bacon"
   gem "mocha-on-bacon"
   gem "rake"
-  gem 'coveralls', :require => false
+  gem 'coveralls', :require => false, :git => 'https://github.com/lemurheavy/coveralls-ruby.git'
 end
 
 group :debugging do

spec/spec_helper.rb

@@ -16,13 +16,6 @@ if ENV['CI'] || ENV['GENERATE_COVERAGE']
   end
 end
 
-# TODO: Coverall loads colorize which interferes with colored making certain
-# specs fail. This should be removed once Coverall is fixed.
-#
-# https://github.com/lemurheavy/coveralls-ruby/issues/14
-#
-require 'colored'
-
 # Set up
 #-----------------------------------------------------------------------------#