Update podspec, remove dependencies AFNetworking and iOS5.0

AdjustIO.podspec

@@ -1,14 +1,13 @@
 Pod::Spec.new do |s|
   s.name         = "AdjustIO"
-  s.version      = "2.0"
+  s.version      = "2.0.1"
   s.summary      = "This is the iOS SDK of AdjustIo. You can read more about it at http://adjust.io."
   s.homepage     = "http://adjust.io"
   s.license      = { :type => 'MIT', :file => 'MIT-LICENSE' }
   s.author       = { "Christian Wellenbrock" => "welle@adeven.com" }
-  s.source       = { :git => "https://github.com/adeven/adjust_ios_sdk.git", :tag => "v2.0" }
-  s.platform     = :ios, '5.0'
+  s.source       = { :git => "https://github.com/adeven/adjust_ios_sdk.git", :tag => "v2.0.1" }
+  s.platform     = :ios, '4.3'
   s.framework    = 'AdSupport, SystemConfiguration'
   s.source_files = 'AdjustIo/*.{h,m}', 'AdjustIo/AIAdditions/*.{h,m}'
   s.requires_arc = true
-  s.dependency 'AFNetworking', '~> 1.2.1'
-end
+end