Implement concept of Adapters

[jaridmargolin]

I wanted to start a discussion around the idea of abstracting web driver implementations into "adapters" which have a specified interface.

A little background: We have scripts already written utilizing selenium-webdriver however we do not currently have the ability to run against a grid of browsers. We examined the source code of this library and loved the implementation. The only issue is that it is dependnent on utilizing wd rather than selenium-webdriver.

By agreeing on a common interface, the webdriver implementations could be abstracted and specified as a configuration option. The library would default to using wd.

At a high level if you are ok with this approach, I can dive deeper and propose what the interface will look like. Upon approval of the interface, I will make the necessary code changes and submit a PR.

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If you are not longer maintaining this library, or have little interest in the proposed changes, we will move ahead by forking and simply swapping wd out.

Thanks!

[jmreidy]

I am hugely in favor of this approach. It had been discussed in the past but was considered too difficult to pursue - but if you're willing to do it, go for it, I'd happily bring it to master.