Figure out a cleaner way to deal with redirect writers

We need to investigate if there is a way to get rid of `WriteTo`, `WriteLiteralTo` etc completely in our runtime code gen which in turn will remove the need to have redirected writers like `RedirectedBasicWriter` which does pretty much what `RuntimeBasicWriter` does except use `WriteTo`.
Also need to investigate the implications of this working with Razor 1.0.

cc @NTaylorMullen @rynowak 