Integrate with other platforms

Integrate with other platforms capable of producing screenshots.

Decouple from Selenium, create a generic abstraction for use with any screenshot/remote control tool.

Possible platforms include:

Jemmy (http://wiki.netbeans.org/Jemmy) for Java
Swinger (https://github.com/demetriusnunes/swinger)
GNU Xnee (https://xnee.wordpress.com/) for any Unix/Linux X Windows application

The issue names no files or tests; start by locating the existing Selenium integration and reading how screenshot and remote-control operations are represented. Compare that boundary with Jemmy, Swinger, and GNU Xnee, and define completion as supporting the agreed alternative platforms through a generic abstraction without Selenium-specific coupling.

Written by the indexing model from the issue text.