Improve Pipelining Support

[afscrome]

Add support for pipelining, so commands like the following can be done

Get-Blog -Id 123 | Get-BlogPost
Get-CommunityForum -Id 12 | Remove-CommunityForum

The commands already support binding fromt eh pipeline, the main problem is that the objects ont eh entity names don't usually match waht the command wants. e.g. on a blog entity, the Id is named Id whereas the rest endpoint wants BlogId and can't map the two.

To support this, I'm thinking of adding some dynamic aliases when processing a response entity.
https://github.com/afscrome/SampleDataGenerator/blob/master/CommunityRest/Common.ps1#L285-L288

i.e. if there is a property called Id and the entity is of type FOO, add an alias so FOOId as an alias of Id. (do this recursively for all nested entities). This can be done with something like:

Add-Member -MemberType AliasProperty -Name FOOId -Value Id -PassThru