windows: Don't import readline if not existent
windows: Don't import readline if not existent

Readline is no default on Windows python distributions. If readline is
not existent, just don't use it, the functions do also work (with
slightly less features).

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