Improved support for CocoaPods-Core version.

Gemfile

 source "http://rubygems.org"
 
-BUNDLER_LOAD = true
+unless defined?(Pod::VERSION)
+  ::BUNDLER_GEMSPEC = true unless defined?(::BUNDLER_GEMSPEC)
+end
 gemspec
 
 group :development do

cocoapods.gemspec

@@ -4,7 +4,7 @@ $:.unshift File.expand_path('../lib', __FILE__)
 Gem::Specification.new do |s|
 
   # Use the version of CocoaPods-Core
-  if BUNDLER_LOAD = true
+  if !defined?(Pod::VERSION) && defined?(::BUNDLER_GEMSPEC)
     s.version = '0.0.0'
   else
     require 'cocoapods-core'

lib/cocoapods.rb

@@ -11,8 +11,6 @@ unless Gem::Version::Requirement.new('>= 1.4.0').satisfied_by?(Gem::Version.new(
   exit 1
 end
 
-require 'cocoapods/version'
-
 module Pod
   class PlainInformative < StandardError
   end