Add documentation for ZigBee integration and components.#171

Merged

balloob merged 2 commits intohome-assistant:nextfrom

flyte:zigbee-pr

Jan 30, 2016

Commits on Jan 28, 2016

Add ZigBee component documentation.
flyte
committed

Commits on Jan 29, 2016

Add links, fix code block, add missing config variable.
flyte
committed