Linter doesn't recognize Behaviors defined using PolymerLabs/IMD

[BrendanDavies]

Receiving "Behavior * not found when mixing properties into *!" for behaviors defined and imported using IMD (https://github.com/PolymerLabs/IMD). This is also causing any inherited properties to error with "Property % bound to attribute % not found in 'properties' for element %".

Note: I am using /** @polymerBehavior */ on my behavior definitions as well.