jamwt/Angel — pull request #6 by yihuang (2012-02-10 03:07:34+00:00)
Title: support string interpolation in config.

For example, this patch allow angel configured like this, taking advantage of interpolation feature of configurator package :

```
services = "/path/to/services"
test {
root = "$(services)/myprogram"
exec = "$(test.root)/myprogram"
stdout = "$(test.root)/myprogram.stdout"
stderr = "$(test.root)/myprogram.stderr"
delay = 2
}
```