Add a basic spec for the init subcommand.

spec/functional/command/init_spec.rb

+require File.expand_path('../../../spec_helper', __FILE__)
+
+module Pod
+  describe Command::Init do
+
+    it "runs with no parameters" do
+      lambda { run_command('init') }.should.not.raise CLAide::Help
+    end
+
+    it "complains when given parameters" do
+      lambda { run_command('init', 'create') }.should.raise CLAide::Help
+      lambda { run_command('init', '--create') }.should.raise CLAide::Help
+      lambda { run_command('init', 'NAME') }.should.raise CLAide::Help
+      lambda { run_command('init', 'createa') }.should.raise CLAide::Help
+      lambda { run_command('init', 'agument1', '2') }.should.raise CLAide::Help
+      lambda { run_command('init', 'which') }.should.raise CLAide::Help
+      lambda { run_command('init', 'cat') }.should.raise CLAide::Help
+      lambda { run_command('init', 'edit') }.should.raise CLAide::Help
+    end
+
+    extend SpecHelper::TemporaryRepos
+
+    it "creates a Podfile" do
+      run_command('init')
+      path = temporary_directory + 'Podfile'
+      File.exists?(path).should == true
+    end
+  end
+end