Browser sequence plugin

Created by: Zapotek

Add a plugin that:

1. Takes a list of DOM transitions from a YAML (or something) file;
   1. Should be an array of transitions groups to allow support for multiple snapshots.
2. Plays them;
3. Pushes the resulting snapshots to the framework to be audited.

See: http://support.arachni-scanner.com/discussions/questions/13108-dialogs-inputdependent