The `exercise-gen.pl6` file can be used in the following ways:
* From within the directory of the exercise you wish to generate a test for.
* With arguments specifying which exercises you want to generate tests for.  
  e.g. `./exercise-gen.pl6 hello-world leap`
* With the argument `--all` to run the generator for all exercises.  
  i.e `./exercise-gen.pl6 --all`

The generator will retrieve data from an `example.yaml` file within
each exercise directory, and use the contained information to generate
test files using `templates/test.mustache`. If it finds a
`canonical-data.json` file in `x-common` for the exercise in
question it will be included.

Example of a yaml file:
```yaml
exercise: MyExercise
version: 1
plan: 10
modules:
  - use: Data::Dump
  - use: Foo::Bar
imports: 'MyClass &my-subroutine'
methods: 'foo bar'
tests: |
  ok True, 'Perl 6 code here';
  pass;
```

You must have `Template::Mustache` and `YAMLish` to run `exercise-gen.pl6`.

The `exercise-gen.pl6` file can be used in the following ways:
* From within the directory of the exercise you wish to generate a test for.
* With arguments specifying which exercises you want to generate tests for.  
  e.g. `./exercise-gen.pl6 hello-world leap`
* With the argument `--all` to run the generator for all exercises.  
  i.e `./exercise-gen.pl6 --all`

You will either need to create a symlink to or clone the
[x-common](https://github.com/exercism/x-common) repository
into the root directory of this repository.
The generator will retrieve data from an `example.yaml` file within
each exercise directory, and use the contained information to generate
test files using `templates/test.mustache`. If it finds a
`canonical-data.json` file in `x-common` for the exercise in
question it will be included.

Example of a yaml file:
```yaml
exercise: MyExercise
version: 1
plan: 10
modules:
  - use: Data::Dump
  - use: Foo::Bar
imports: 'MyClass &my-subroutine'
methods: 'foo bar'
tests: |
  ok True, 'Perl 6 code here';
  pass;
```

You must have `Template::Mustache` and `YAMLish` to run `exercise-gen.pl6`.

Add info on x-common for generator
Add info on x-common for generator
