Added Unzip task. Added Example in rakefile.

.gitignore

@@ -33,3 +33,5 @@ albacore.gemspec
 web.config.example
 albacore_example.zip
 TestResult.xml
+temp
+unziptask

lib/albacore/unzip.rb

@@ -0,0 +1,28 @@
+require 'albacore/support/albacore_helper'
+require 'zip/zip'
+require 'zip/zipfilesystem'
+include Zip
+
+class Unzip
+	include YAMLConfig
+	include Failure
+
+	attr_accessor :unzip_path, :zip_file
+
+	def initialize
+		super()
+	end
+
+	def unzip()
+		fail_with_message 'Zip File cannot be empty' if @zip_file.nil?
+		return if @zip_file.nil?
+
+		Zip::ZipFile.open(@zip_file) do |zip_file|
+        zip_file.each do |file|
+           out_path = File.join(@unzip_path, file.name)
+           FileUtils.mkdir_p(File.dirname(out_path))
+           zip_file.extract(file, out_path) unless File.exist?(out_path)
+        end
+      end
+	end
+end

lib/rake/unziptask.rb

@@ -0,0 +1,16 @@
+require 'rake/tasklib'
+
+def unziptask(name=:unzip, *args, &block)
+	Albacore::UnZipTask.new(name, *args, &block)
+end
+
+module Albacore
+	class UnZipTask < Albacore::AlbacoreTask
+		def execute(task_args)
+			@zip = Unzip.new
+			@block.call(@zip, *task_args) unless @block.nil?
+			@zip.unzip
+			fail if @zip.failed
+		end		
+	end
+end

rakefile.rb

@@ -181,7 +181,13 @@
 		zip.output_path = File.dirname(__FILE__)
 		zip.directories_to_zip = ["lib", "spec"]
 		zip.additional_files = "README.markdown"
-		zip.file = 'albacore_example.zip'
+		zip.output_file = 'albacore_example.zip'
+	end
+
+  desc "Run UnZip example"
+	unziptask do |zip|
+		zip.unzip_path = File.join File.dirname(__FILE__), 'temp'
+		zip.zip_file = 'albacore_example.zip'
 	end
 
 	desc "MSpec Test Runner Example"