Update Server Example

- include example file mappings
- add a before hook
- add comments to explain each type of option
Support Index Views

- if no file extension, detect engine based on an assumed index.html
- index filename can be set via options
First integration for mock data files

- YAML
- JSON
Add mock support for Jekyll-style headers

- variables can now be defined in YAML at the top of a page
- add tests for inner-page mock
Engines now use .extension format

- each extension must begin with a “.”
- increases clarity while scanning files
Update README
Private Files

- hide any file starting with _
- make sure bundles do not concatenate files with an _
- rename all data files to prefix with _
- private template files should also start with _
Simplify Engines Template

- extensions —> compile
- input_type —> from
- output_type —> to
- render —> using