* First draft of Axis component documentation
* Small improvements
* Added information about lowest supported Axis firmware
* Trigger time better explains functionality than scan interval
* Simplified explanation of automatic discovery
* Rephrasing manually configuring device
* Keep first and second level variables separated for ease of reading
* Moved up dependency and used Hassbian paths as an example
* Indented include variables descriptions to clarify their relation
* Made configuration variables tile linkable
* Axis devices are part of the discovery mechanism
* Update axis.markdown
* Update binary_sensor.axis.markdown
* Update camera.axis.markdown
