Added missing docs

Added label property to FullAlbum

Fixes JohnnyCrazy#199

PUT method for SeekPlayback (JohnnyCrazy#190)

Added docs for configuration

Added source to publish.cmd

Add Audio Track Analysis models and API endpoint (JohnnyCrazy#161)

* Add Audio Track Analysis models and API endpoint

* Update docs

* Add link to EchoNest archived docs for AudioAnalysis model

Create CODE_OF_CONDUCT.md

Fixed Header add

Removed Proxy = null

Merge pull request JohnnyCrazy#135 from henningms/master

JohnnyCrazy#134 Adds User-Agent in the OAuth request due to recent changes in th…