Validate on all pod commands that the user is using a terminal in utf-8

bin/pod

@@ -1,5 +1,9 @@
 #!/usr/bin/env ruby
 
+if RUBY_VERSION > '1.8.7' && Encoding.default_external != Encoding::UTF_8
+  raise Informative 'CocoaPods requires your terminal to be using UTF-8 encoding'
+end
+
 if $0 == __FILE__ && !ENV['COCOAPODS_NO_BUNDLER']
   ENV['BUNDLE_GEMFILE'] = File.expand_path('../../Gemfile', __FILE__)
   require "rubygems"
@@ -10,7 +14,7 @@ elsif ENV['COCOAPODS_NO_BUNDLER']
   gem "cocoapods"
 end
 
-if (ENV['CP_STDOUT_SYNC'] == 'TRUE')
+if ENV['CP_STDOUT_SYNC'] == 'TRUE'
   STDOUT.sync = true
 end