added kernel modes

lib/fog/compute/linode.rb

@@ -13,6 +13,8 @@ module Fog
       collection :images
       model :server
       collection :servers
+      model :kernel
+      collection :kernels
 
       request_path 'fog/compute/requests/linode'
       request :avail_datacenters

lib/fog/compute/models/linode/image.rb

@@ -7,12 +7,7 @@ module Fog
         identity :id
         attribute :name
         attribute :bits
-        attribute :kernel_id
         attribute :image_size
-
-        def kernel
-          Kernel.populate kernel_id
-        end
       end
     end
   end

lib/fog/compute/models/linode/kernel.rb

@@ -0,0 +1,12 @@
+require 'fog/core/model'
+
+module Fog
+  module Linode
+    class Compute
+      class Kernel < Fog::Model
+        identity :id
+        attribute :name
+      end
+    end
+  end
+end

lib/fog/compute/models/linode/kernels.rb

@@ -0,0 +1,32 @@
+require 'fog/core/collection'
+require 'fog/compute/models/linode/kernel'
+
+module Fog
+  module Linode
+    class Compute
+      class Kernels < Fog::Collection
+        model Fog::Linode::Compute::Kernel
+
+        def all
+          load kernels
+        end
+
+        def get(id)
+          new kernels(id).first
+        rescue Fog::Linode::Compute::NotFound
+          nil
+        end
+
+        private
+        def kernels(id=nil)
+          connection.avail_kernels(id).body['DATA'].tap { |data| map_kernels data }
+        end
+        
+        def map_kernels(kernels)
+          kernels.map! { |kernel| kernel.each_with_object({}) { |(k, v), h| h[k.downcase.to_sym] = v  }  }
+          kernels.each { |kernel| kernel.merge! :id => kernel[:kernelid], :name => kernel[:label] }
+        end
+      end
+    end
+  end
+end

lib/fog/compute/requests/linode/avail_kernels.rb

@@ -2,7 +2,11 @@ module Fog
   module Linode
     class Compute
       class Real
-        def avail_kernels(options={})
+        def avail_kernels(kernel_id=nil)
+          options = {}
+          if kernel_id
+            options.merge!(:kernelId => kernel_id)
+          end          
           request(
             :expects  => 200,
             :method   => 'GET',