Move to Giter8

I propose that we move this into a [Giter8](http://www.foundweekends.org/giter8/) project. This simplifies what the user has to do down to one line:
```bash
sbt new seldridge/chisel-template.g8
```

You also have some ability to customize the project with some super idiotic (m4-level) string replacement.

I have an example version (using the `release` branch as opposed to `master`) here:
- https://github.com/seldridge/chisel-template.g8

Review the existing repository layout and compare it with the linked seldridge/chisel-template.g8 example, particularly its release branch. Determine what must move into the Giter8 project and verify that the one-line sbt new command creates the expected template with the proposed substitutions.

Written by the indexing model from the issue text.