Project name should be used in relevant templates

[megnotarte]

cloudfour/generator-drizzle#9

Small

[erikjung]

More info on the plan of attack for this...

The generator is going to be updated to output a default Drizzle data file for template consumption.

For example, if "My Project" is supplied as a project title during the generator prompting, then a file like this will be created:

# project.yaml
title: My Project

and the resulting Drizzle templates will be able to use it as regular data:

<title>{{data "project.title"}}</title>

This data file approach will ultimately be more flexible and easier to maintain, compared to writing the user input values to hard-coded HTML.

/CC @mrgerardorodriguez @tylersticka