Scaffolded readmes can collide

[mattchenderson]

For .NET on the isolated worker model at least, both TimerTrigger and RabbitMQ trigger attempt to create a readme.md. If you attempt to use both templates, the results of one will overwrite the other. If such a file is needed, the filename should be conditioned on the name given as a parameter to the item template. For example, myTimerTrigger_readme.md or something like that.

We should also assess if it is actually necessary to output markdown as part of these gestures. The content here may more appropriately be handled in code comments, etc.