When a `Template` annotation declares a `url` value, parse it to
generate `getter`s, `setter`s, and `method`s which will it needs to
access reflectively.
Move existing BindGenerator test to its own directory and to test that
phase specificially, rather than the whole pipeline.
Add another BindGenerator test.
Adds any metadata attached to a parameter to the "parameters" value
passed in to `registerType`.
For example:
`MyComponent(@Inject(Foo) foo)` generates
`"parameters": const [const [const Inject(Foo)]]`
Also reorganizes the testing code.
Closes#7
