v1.4.0

• Add Logger.getLevel() (#49, @BenjaminVadant)
• Invoke console.debug if present (#34, @ajwagner777)
• Add Typing for Logger.createDefaultHandler() (#55, @scevallos)
• Fix typo in README (#43, @gamtiq)
• Update README to reference rawgit.com (#33, @tjenkinson)