Test-tube

In this release, we shortened the API names and modified some of the internals of the hyperparameter optimizer.

New features:
- Log scale opt parameters
- Shorter API names
- Initial test harness
- Documentation upgrades

In this release Experiment becomes a subclass of tensorboardx. SummaryWriter.

The Experiment API flows to the SummaryWriter underneath. However, using test-tube gives a more organized layout across experiments.