resolves #4: test usages outside of standard `beforeEach()`

- you can use `window.debaser()` in a `before()` block, but not bare.
- you can use `window.debase()` in a `beforeEach()` block, or an it() block.
- added some convenience fns to `debaser()`
- `debaser()` keeps a `$$globalInstance` reference if used outside of spec context (like in a `before()`), separate than the default instance, which is to be used in spec context.  using multiple debasers in/out of spec ctx may need more testing.
- `$$globalInstance` will retain its queue, which is necessary if you want more than one test to pass.
- you can now override the default Debaser name, I guess.
- removed unused `Debaser.prototype.$config`
fixing port issues