Some fixes for the Stations documentation

[anonpenguin]

Hi! Thanks for the great documentation. I'm implementing a library based off of this in C# and made a few changes to the Stations doc:

• stationArtSize is optional in user.getStationList
• Added note on how to decode stations.dateCreated.time
• Responses for stations are now returning a new boolean, allowEditDescription
• Fixed syntax highlighting for search example response
• dateCreated is no longer included with responses from user.getStation or station.addMusic

[PromyLOPh]

Merged, thank you!