Refactor DDLogMessage: rename properties, make more Objetive-C-like and remove superfluous init method
Modernize DDDispatchQueueLogFormatter and DDContextFilterLogFormatter
Refactor and use logging primitive with other +log: methods
Minor changes
Update CocoaLumberjack.swift and accompanying iOSSwift demo
Refactor DDLoggerNode and internal methods
DDASLLogCapture: Remove redundant "log" from methods
Minor changes
Update demos
Merge pull request #392 from rivera-ernesto/refactor_ddlogmessage

Refactor DDLogMessage, DDLoggerNode and internal methods
Merge commit '55280cb5944c8d9bfb74772d9ed26aae4b861973'

* commit '55280cb5944c8d9bfb74772d9ed26aae4b861973':
  Update demos
  Minor changes
  DDASLLogCapture: Remove redundant "log" from methods
  Refactor DDLoggerNode and internal methods
  Update CocoaLumberjack.swift and accompanying iOSSwift demo
  Minor changes
  Refactor and use logging primitive with other +log: methods
  Modernize DDDispatchQueueLogFormatter and DDContextFilterLogFormatter
  Refactor DDLogMessage: rename properties, make more Objetive-C-like and remove superfluous init method