Complete page / post revision maint (#13)

- Fix log on redirection
- Move page handlers to its own file
- Add version to admin area footer
- Move generator to HttpContext extension property

src/MyWebLog/MyWebLog.fsproj

@@ -16,6 +16,7 @@
     <Compile Include="Handlers\Helpers.fs" />
     <Compile Include="Handlers\Admin.fs" />
     <Compile Include="Handlers\Feed.fs" />
+    <Compile Include="Handlers\Page.fs" />
     <Compile Include="Handlers\Post.fs" />
     <Compile Include="Handlers\User.fs" />
     <Compile Include="Handlers\Upload.fs" />