upon 0.10.0

A simple, powerful template engine with minimal dependencies and configurable delimiters
Documentation
# examples

Examples can be run from anywhere in the repo using the following.

```sh
cargo run --example <name>
```

- [serde]serde.rs: Demonstrates rendering a simple template using a custom
  global context that implements `serde::Serialize`.

- [custom_syntax]custom_syntax.rs: Demonstrates how to configure the template engine with
  custom syntax delimiters.

- [escape_html]escape_html.rs: Demonstrates how to configure a _value
  formatter_ to escape strings for HTML and add an "unescape" _value formatter_
  for outputting values unescaped.

- [functions]functions.rs: Demonstrates how to configure custom functions for
  transforming data before rendering.

- [static_templates]static_templates.rs: Demonstrates how to statically
  include templates in the binary using the `include_str!` macro.

- [runtime_templates]runtime_templates.rs: Demonstrates how to implement a
  file loader. Files are are loaded at _runtime_ from the `templates/` directory
  and added to the engine.

- [custom_template_store]custom_template_store.rs: Demonstrates how to
  implement a custom template store. This can allow for things like
  - relative template paths
  - controlling template access
  - lazy loading (if you use interior mutability)