Updated GettingStarted.md to include `ddLogLevel`
Updated GettingStarted.md to include `ddLogLevel`

Updated documentation to reflect required setup instructions for 2.0.1.
See issue #542
timbodeit/CocoaLumberjack,sinoru/CocoaLumberjack,DD-P/CocoaLumberjack,CocoaLumberjack/CocoaLumberjack,timbodeit/CocoaLumberjack,mpapp/CocoaLumberjack,mqeizi/CocoaLumberjack,dmauro/CocoaLumberjack,Jawbone/CocoaLumberjack,Nuglif/CocoaLumberjack,sinoru/CocoaLumberjack,Jawbone/CocoaLumberjack,sushichop/CocoaLumberjack,SportsLock/CocoaLumberjack,Nuglif/CocoaLumberjack,jum/CocoaLumberjack,mqeizi/CocoaLumberjack,CocoaLumberjack/CocoaLumberjack,DD-P/CocoaLumberjack,jum/CocoaLumberjack,timbodeit/CocoaLumberjack,mpapp/CocoaLumberjack,SportsLock/CocoaLumberjack,Jawbone/CocoaLumberjack,dmauro/CocoaLumberjack,timbodeit/CocoaLumberjack,Nuglif/CocoaLumberjack,SportsLock/CocoaLumberjack,SportsLock/CocoaLumberjack,sushichop/CocoaLumberjack,sushichop/CocoaLumberjack,mqeizi/CocoaLumberjack,sushichop/CocoaLumberjack,sinoru/CocoaLumberjack,SportsLock/CocoaLumberjack,jum/CocoaLumberjack,dmauro/CocoaLumberjack,sinoru/CocoaLumberjack,CocoaLumberjack/CocoaLumberjack,Nuglif/CocoaLumberjack,Jawbone/CocoaLumberjack,Jawbone/CocoaLumberjack,CocoaLumberjack/CocoaLumberjack,Nuglif/CocoaLumberjack,mpapp/CocoaLumberjack,jum/CocoaLumberjack,mqeizi/CocoaLumberjack,DD-P/CocoaLumberjack,timbodeit/CocoaLumberjack,sinoru/CocoaLumberjack,mqeizi/CocoaLumberjack