Style the unplaced unit tokens and show a message if there are no unplaced units.
Base structure for addUnits/addMachines in ecs

Checkpoint.

Add units and machines added to ECS - tests pass.

Make lint happy

Tests added for new ECS methods.
Merge pull request #304 from makyo/more-ecs-calls

Add units and machines added to ECS - tests pass.
Tests added for new ECS methods.

To QA - from the console, follow the steps here: https://gist.github.com/makyo/9dc0503658b439d1ed7e
Merge pull request #300 from huwshimi/unplaced-service-styling

Styled the unplaced unit tokens according to the design.
Added a message if there are no unplaced units. The message should disappear if the scale up list of units is visible.