Use mutant- as main plugin require integration point

lib/mutant-rspec.rb

@@ -0,0 +1,5 @@
+# encoding: UTF-8
+
+require 'mutant/rspec'
+require 'mutant/rspec/killer'
+require 'mutant/rspec/strategy'

lib/mutant.rb

@@ -134,4 +134,3 @@ require 'mutant/reporter/cli/printer/subject'
 require 'mutant/reporter/cli/printer/killer'
 require 'mutant/reporter/cli/printer/mutation'
 require 'mutant/zombifier'
-require 'mutant/rspec'

lib/mutant/cli.rb

@@ -201,7 +201,7 @@ module Mutant
     # @api private
     #
     def use(name)
-      require "mutant/#{name}"
+      require "mutant-#{name}"
       @strategy = Strategy.lookup(name).new
     rescue LoadError
       $stderr.puts("Cannot load plugin: #{name.inspect}")

lib/mutant/rspec.rb

@@ -1,9 +1,9 @@
+# encoding: UTF-8
+
 require 'rspec'
 
-require 'mutant/rspec/killer'
-require 'mutant/rspec/strategy'
-
 module Mutant
+  # Rspec integration namespace
   module Rspec
   end # Rspec
 end # Mutant

spec/unit/mutant/rspec/killer_spec.rb

@@ -1,8 +1,9 @@
 # encoding: utf-8
 
 require 'spec_helper'
+require 'mutant-rspec'
 
-describe Mutant::Killer::Rspec, '.new' do
+describe Mutant::Rspec::Killer, '.new' do
 
   before do
     pending 'dactivated'