Fix merge conflict
Adding DB back in since it will be needed in future branches.
Switching to EventTracker
Merge pull request #323 from makyo/deployer-bar-cleanup

Tests pass, deployer bar tests are now cleaner.

QA: ensure deployer bar shows change for 4 seconds, then removes it.
Container token creation tested.
Merge pull request #328 from jaycee/test-love-1-containers

There have been minor changes to machine-panel-view to make it easier to tests;
specifically, the duped code rendering container tokens in the regular and the
bare metal case has been broken out into its own method, which can be stubbed.

The test file, test_machine_view_panel.js, has been modified a lot.
* Tests have been reordered to put similar tests together, so it's easier to
  determine what has and has not been tested, and test like things via one
  describe block. e.g. all the drag/drop tests (including those about listening
  to events) are now part of a 'token drag and drop' describe block. I've noted
  inline where tests have just been moved without being altered.
* Many tests have been added for the machine panel view's rendering of
  containers.
Add tests for the machine view header labels.
Merge pull request #327 from huwshimi/header-count-tests

Added missing tests for header labels being updated with the correct machine/container/unit counts.
Unit tests for _smartUpdateList, used in updating machine column.
Unit tests for _renderMachineToken.
Merge pull request #330 from jaycee/test-love-2-machines

app/widgets/machine-panel-view.js 
* ```_smartUpdateList``` has been refactored, moving its two responsibilities--
  adding and removing tokens as necessary--into two methods. These methods are
  easier to test, and a bit clearer to read.

tests/test_machine_view_panel_view.js
* Unit tests for all inputs and all expected behavior of the components of
  _smartUpdateList have been added.
* Unit tests for _updateMachine and _renderMachineToken have been added

Note to reviewers: machine tokens are also tested in their own file, which has
not been updated. Additionally, invisible in the diff, but available in the
full file, machine column has quite extensive functional testing; I've only
added units to more directly tests private methods that were only implicitly
tested.
Switch to an internal list of machine tokens.

By using an internal list, we can re-render specific tokens by pulling
them from the list and simply calling render(). First step towards very
efficient and intelligent rendering of only deltas.
Cleanup per Rick's review.
WIP most tests pass.