Fix arc podspec

The podspec appears to have been copied from SMWebRequest,
but was never completely modified to match with xmldocument.

- Fixed the source link
- Dynamically set tag to version name
- Fix incorrect source_files
- Requires arc

Author: shekibobo

SMXMLDocument.podspec

@@ -1,6 +1,6 @@
 Pod::Spec.new do |s|
   s.name         = "SMXMLDocument"
-  s.version      = "1.0"
+  s.version      = "1.0.1"
   s.summary      = "A lightweight XML Document class for iOS."
   s.description  = <<-DESC
                     SMXMLDocument is a very handy lightweight XML parser for iOS.
@@ -10,8 +10,8 @@ Pod::Spec.new do |s|
   s.homepage     = "https://github.com/nfarina/xmldocument"
   s.license      = 'MIT License'
   s.author       = { "Nick Farina" => "[email protected]" }
-  s.source       = { :git => "https://github.com/nfarina/%3Cspan%20class="x x-first x-last">webrequest.git", :tag => "1.0" }
+  s.source       = { :git => "https://github.com/nfarina/%3Cspan%20class="x x-first x-last">xmldocument.git", :tag => s.version.to_s }
   s.platform     = :ios
-  s.source_files = 'SMWebRequest.{h,m}'
-  s.requires_arc = false
-end
+  s.source_files = 'SMXMLDocument.{h,m}'
+  s.requires_arc = true
+end