[Pod::Specification] Added support for deployment target in platform

lib/cocoapods/command/spec.rb

@@ -187,7 +187,7 @@ Pod::Spec.new do |s|
   # these, or none if it runs on both platforms.
   #
   # s.platform = :ios
-  # s.platform = :ios, :deployment_target => "5.0"
+  # s.platform = :ios, { :deployment_target => "5.0" }
   # s.platform = :osx
 
   # A list of resources included with the Pod. These are copied into the

lib/cocoapods/platform.rb

@@ -30,7 +30,7 @@ module Pod
     def to_s
       case @symbolic_name
       when :ios
-        'iOS'
+        'iOS' + (deployment_target ? " #{deployment_target}" : '')
       when :osx
         'OS X'
       else
@@ -47,7 +47,7 @@ module Pod
     end
 
     def deployment_target
-      if (opt = options[:deployment_target])
+      if (options && opt = options[:deployment_target])
         Pod::Version.new(opt)
       end
     end

lib/cocoapods/specification.rb

@@ -114,7 +114,14 @@ module Pod
     end
 
     def platform=(platform)
-      @platform = Platform.new(platform)
+      if platform.class == Array
+        name = platform[0]
+        options = platform[1]
+      else
+        name = platform
+        options = nil
+      end
+      @platform = Platform.new(name, options)
     end
     attr_reader :platform