DefaultArgParser: Add help text
DefaultArgParser: Add help text

Fixes https://github.com/coala-analyzer/coala/issues/378

stevemontana1980/coala,arjunsinghy96/coala,sils1297/coala,impmihai/coala,Asalle/coala,tltuan/coala,impmihai/coala,lonewolf07/coala,tushar-rishav/coala,Uran198/coala,saurabhiiit/coala,d6e/coala,scriptnull/coala,ManjiriBirajdar/coala,damngamerz/coala,meetmangukiya/coala,RJ722/coala,arush0311/coala,rimacone/testing2,scriptnull/coala,FeodorFitsner/coala,rimacone/testing2,sagark123/coala,tushar-rishav/coala,sils1297/coala,Tanmay28/coala,andreimacavei/coala,shreyans800755/coala,arafsheikh/coala,rresol/coala,MattAllmendinger/coala,abhiroyg/coala,aptrishu/coala,Shade5/coala,impmihai/coala,damngamerz/coala,yashtrivedi96/coala,NalinG/coala,SambitAcharya/coala,incorrectusername/coala,shreyans800755/coala,refeed/coala,sophiavanvalkenburg/coala,sophiavanvalkenburg/coala,scottbelden/coala,djkonro/coala,svsn2117/coala,RJ722/coala,yashtrivedi96/coala,Asnelchristian/coala,djkonro/coala,scriptnull/coala,SambitAcharya/coala,coala/coala,Balaji2198/coala,sagark123/coala,arjunsinghy96/coala,sophiavanvalkenburg/coala,swatilodha/coala,MattAllmendinger/coala,SambitAcharya/coala,MariosPanag/coala,jayvdb/coala,scriptnull/coala,SambitAcharya/coala,SanketDG/coala,AbdealiJK/coala,sudheesh001/coala,Nosferatul/coala,ManjiriBirajdar/coala,rresol/coala,coala-analyzer/coala,sudheesh001/coala,ayushin78/coala,jayvdb/coala,shreyans800755/coala,CruiseDevice/coala,scriptnull/coala,nemaniarjun/coala,ayushin78/coala,AdeshAtole/coala,yland/coala,AdeshAtole/coala,svsn2117/coala,arush0311/coala,jayvdb/coala,JohnS-01/coala,yashtrivedi96/coala,refeed/coala,sagark123/coala,SanketDG/coala,yashLadha/coala,AbdealiJK/coala,netman92/coala,aptrishu/coala,coala-analyzer/coala,Uran198/coala,andreimacavei/coala,dagdaggo/coala,SambitAcharya/coala,sudheesh001/coala,Tanmay28/coala,saurabhiiit/coala,nemaniarjun/coala,MariosPanag/coala,tltuan/coala,svsn2117/coala,karansingh1559/coala,kartikeys98/coala,dagdaggo/coala,coala/coala,arafsheikh/coala,NalinG/coala,yashLadha/coala,Tanmay28/coala,ayushin78/coala,tltuan/coala,karansingh1559/coala,mr-karan/coala,NalinG/coala,arush0311/coala,MariosPanag/coala,arjunsinghy96/coala,yland/coala,JohnS-01/coala,NalinG/coala,JohnS-01/coala,tushar-rishav/coala,d6e/coala,Asnelchristian/coala,Tanmay28/coala,NalinG/coala,CruiseDevice/coala,AdeshAtole/coala,lonewolf07/coala,MattAllmendinger/coala,Tanmay28/coala,incorrectusername/coala,arafsheikh/coala,Asnelchristian/coala,Tanmay28/coala,SanketDG/coala,d6e/coala,kartikeys98/coala,Nosferatul/coala,Shade5/coala,andreimacavei/coala,karansingh1559/coala,Tanmay28/coala,scottbelden/coala,meetmangukiya/coala,coala-analyzer/coala,NiklasMM/coala,vinc456/coala,refeed/coala,Tanmay28/coala,incorrectusername/coala,abhiroyg/coala,coala/coala,NiklasMM/coala,SambitAcharya/coala,yashLadha/coala,scriptnull/coala,djkonro/coala,RJ722/coala,mr-karan/coala,kartikeys98/coala,yland/coala,NalinG/coala,CruiseDevice/coala,abhiroyg/coala,aptrishu/coala,ManjiriBirajdar/coala,Balaji2198/coala,NiklasMM/coala,dagdaggo/coala,stevemontana1980/coala,meetmangukiya/coala,vinc456/coala,stevemontana1980/coala,vinc456/coala,sils1297/coala,AbdealiJK/coala,swatilodha/coala,Asalle/coala,NalinG/coala,damngamerz/coala,FeodorFitsner/coala,Nosferatul/coala,netman92/coala,Shade5/coala,scottbelden/coala,nemaniarjun/coala,scriptnull/coala,Asalle/coala,swatilodha/coala,mr-karan/coala,rresol/coala,saurabhiiit/coala,SambitAcharya/coala,netman92/coala,Uran198/coala,Balaji2198/coala,lonewolf07/coala,FeodorFitsner/coala,rimacone/testing2