Remove pluralization service

[tpetricek]

The NameUtils.fs file uses PluralizationService from System.Data.Entity.Design.PluralizationServices. This needs to be replaced with some other library or a custom implementation of English pluralization (in order to make the library compatible with the Client profile and more importantly also for portable profile and Mono).

[ovatsus]

I've used a fairly comprehensive c# pluralizer I found some time ago on the web in one of my projects, and it worked farily well. I can try to dig it up, convert it to F# and submit a PR

[tpetricek]

That would be great. I tried looking at the pluralization rules but gave up. If we need to get rid o it for portable profile sooner, feel free to replace the function with something simple (if s.EndsWith("s") then s + "es" else s + "s" will do the trick.)

[tpetricek]

@forki pointed me to the pluralization code in FSharpx so we can reuse that. Please send any updates to FSharpx too!