Ref #430 - Identify anonymous users by their hash and salted MAC address

See #430 for the underlying details.
Better tester port determining. Turns out pid is prone to duplication
Merge branch 'master' into dev-mac
Merge branch 'dev' into dev-mac
More fallbacks if mac fails
Reduce the console pause delay after collecting info

From 5 seconds to 2 seconds
v6.22.0. Improvement.

- v6.22.0 March 6, 2013
	- Better port assignment to testers -
[changeset](https://github.com/bevry/docpad/commit/244390c5d349598e35e2b
99347c8b067006aa293)
	- We now identify anonymous users (while respecting their anonymity) -
[changeset](https://github.com/bevry/docpad/commit/fb8de48d7dcfc4e9211fd
898cda91c54553c1f58)
		- Closes [#430](https://github.com/bevry/docpad/issues/430)
Merge branch 'master' into dev
Merge branch 'dev-mac' into dev
Merge branch 'master' of github.com:bevry/docpad