Add a note to the README, that one should create a swift-source directory before using update-checkout to ensure that there are no collisions between update-checkout/swift repositories and other repos that the user may have checked out.
Add a note to the README, that one should create a swift-source directory before using update-checkout to ensure that there are no collisions between update-checkout/swift repositories and other repos that the user may have checked out.

Thanks to ssen for the suggestion!

hughbe/swift,gottesmm/swift,deyton/swift,gregomni/swift,bitjammer/swift,sschiau/swift,natecook1000/swift,austinzheng/swift,tinysun212/swift-windows,deyton/swift,kstaring/swift,hooman/swift,shajrawi/swift,devincoughlin/swift,aschwaighofer/swift,practicalswift/swift,manavgabhawala/swift,calebd/swift,atrick/swift,stephentyrone/swift,bitjammer/swift,gregomni/swift,airspeedswift/swift,xedin/swift,danielmartin/swift,kperryua/swift,natecook1000/swift,therealbnut/swift,jckarter/swift,zisko/swift,danielmartin/swift,natecook1000/swift,practicalswift/swift,ben-ng/swift,gribozavr/swift,tinysun212/swift-windows,danielmartin/swift,CodaFi/swift,practicalswift/swift,deyton/swift,milseman/swift,djwbrown/swift,nathawes/swift,huonw/swift,austinzheng/swift,kperryua/swift,jtbandes/swift,roambotics/swift,airspeedswift/swift,nathawes/swift,huonw/swift,bitjammer/swift,nathawes/swift,ben-ng/swift,allevato/swift,gribozavr/swift,codestergit/swift,IngmarStein/swift,austinzheng/swift,apple/swift,sschiau/swift,lorentey/swift,gmilos/swift,natecook1000/swift,austinzheng/swift,therealbnut/swift,glessard/swift,practicalswift/swift,karwa/swift,tardieu/swift,ben-ng/swift,modocache/swift,xedin/swift,kstaring/swift,tardieu/swift,return/swift,OscarSwanros/swift,benlangmuir/swift,deyton/swift,bitjammer/swift,OscarSwanros/swift,lorentey/swift,frootloops/swift,ben-ng/swift,manavgabhawala/swift,danielmartin/swift,JGiola/swift,milseman/swift,xedin/swift,karwa/swift,austinzheng/swift,rudkx/swift,CodaFi/swift,JaSpa/swift,felix91gr/swift,allevato/swift,nathawes/swift,IngmarStein/swift,frootloops/swift,JGiola/swift,swiftix/swift,codestergit/swift,JaSpa/swift,rudkx/swift,xwu/swift,CodaFi/swift,JGiola/swift,rudkx/swift,brentdax/swift,ahoppen/swift,natecook1000/swift,aschwaighofer/swift,ahoppen/swift,arvedviehweger/swift,amraboelela/swift,codestergit/swift,therealbnut/swift,nathawes/swift,JaSpa/swift,OscarSwanros/swift,huonw/swift,swiftix/swift,devincoughlin/swift,alblue/swift,tardieu/swift,felix91gr/swift,parkera/swift,alblue/swift,swiftix/swift,apple/swift,stephentyrone/swift,brentdax/swift,airspeedswift/swift,milseman/swift,benlangmuir/swift,harlanhaskins/swift,felix91gr/swift,atrick/swift,huonw/swift,lorentey/swift,kstaring/swift,uasys/swift,aschwaighofer/swift,tjw/swift,hooman/swift,stephentyrone/swift,frootloops/swift,shahmishal/swift,jmgc/swift,jopamer/swift,glessard/swift,atrick/swift,IngmarStein/swift,IngmarStein/swift,modocache/swift,jckarter/swift,Jnosh/swift,russbishop/swift,gregomni/swift,uasys/swift,zisko/swift,manavgabhawala/swift,jtbandes/swift,practicalswift/swift,nathawes/swift,calebd/swift,gribozavr/swift,xwu/swift,manavgabhawala/swift,gottesmm/swift,huonw/swift,jopamer/swift,calebd/swift,ahoppen/swift,devincoughlin/swift,hooman/swift,gmilos/swift,roambotics/swift,return/swift,gribozavr/swift,gribozavr/swift,shajrawi/swift,hughbe/swift,russbishop/swift,ben-ng/swift,jckarter/swift,apple/swift,tinysun212/swift-windows,jtbandes/swift,shajrawi/swift,shajrawi/swift,frootloops/swift,xedin/swift,uasys/swift,gmilos/swift,kperryua/swift,return/swift,gottesmm/swift,alblue/swift,gottesmm/swift,tjw/swift,uasys/swift,xedin/swift,devincoughlin/swift,therealbnut/swift,JGiola/swift,atrick/swift,modocache/swift,airspeedswift/swift,allevato/swift,tkremenek/swift,return/swift,tkremenek/swift,shahmishal/swift,practicalswift/swift,roambotics/swift,return/swift,tinysun212/swift-windows,huonw/swift,amraboelela/swift,gregomni/swift,arvedviehweger/swift,sschiau/swift,shahmishal/swift,zisko/swift,djwbrown/swift,lorentey/swift,roambotics/swift,hughbe/swift,JaSpa/swift,modocache/swift,tardieu/swift,devincoughlin/swift,amraboelela/swift,hughbe/swift,aschwaighofer/swift,djwbrown/swift,jopamer/swift,benlangmuir/swift,shahmishal/swift,OscarSwanros/swift,benlangmuir/swift,tardieu/swift,frootloops/swift,harlanhaskins/swift,swiftix/swift,gmilos/swift,shahmishal/swift,glessard/swift,shajrawi/swift,sschiau/swift,lorentey/swift,tinysun212/swift-windows,JaSpa/swift,xedin/swift,arvedviehweger/swift,glessard/swift,frootloops/swift,codestergit/swift,jmgc/swift,arvedviehweger/swift,amraboelela/swift,parkera/swift,xedin/swift,modocache/swift,lorentey/swift,amraboelela/swift,hughbe/swift,karwa/swift,Jnosh/swift,jtbandes/swift,amraboelela/swift,xwu/swift,therealbnut/swift,CodaFi/swift,danielmartin/swift,milseman/swift,brentdax/swift,russbishop/swift,gottesmm/swift,hughbe/swift,calebd/swift,jtbandes/swift,brentdax/swift,russbishop/swift,parkera/swift,frootloops/swift,alblue/swift,bitjammer/swift,harlanhaskins/swift,milseman/swift,kperryua/swift,JGiola/swift,kperryua/swift,hooman/swift,JaSpa/swift,tkremenek/swift,sschiau/swift,xwu/swift,alblue/swift,tjw/swift,airspeedswift/swift,djwbrown/swift,karwa/swift,russbishop/swift,Jnosh/swift,russbishop/swift,gregomni/swift,atrick/swift,airspeedswift/swift,roambotics/swift,Jnosh/swift,sschiau/swift,jopamer/swift,natecook1000/swift,tardieu/swift,aschwaighofer/swift,parkera/swift,practicalswift/swift,rudkx/swift,allevato/swift,benlangmuir/swift,brentdax/swift,aschwaighofer/swift,allevato/swift,ben-ng/swift,parkera/swift,karwa/swift,gribozavr/swift,arvedviehweger/swift,djwbrown/swift,benlangmuir/swift,gmilos/swift,devincoughlin/swift,ahoppen/swift,parkera/swift,atrick/swift,jmgc/swift,felix91gr/swift,gregomni/swift,JaSpa/swift,airspeedswift/swift,stephentyrone/swift,tinysun212/swift-windows,JGiola/swift,uasys/swift,russbishop/swift,stephentyrone/swift,devincoughlin/swift,tinysun212/swift-windows,CodaFi/swift,swiftix/swift,IngmarStein/swift,kperryua/swift,tkremenek/swift,gottesmm/swift,manavgabhawala/swift,kperryua/swift,apple/swift,modocache/swift,milseman/swift,IngmarStein/swift,alblue/swift,kstaring/swift,tjw/swift,karwa/swift,apple/swift,harlanhaskins/swift,tjw/swift,shahmishal/swift,lorentey/swift,djwbrown/swift,calebd/swift,jopamer/swift,kstaring/swift,lorentey/swift,danielmartin/swift,harlanhaskins/swift,manavgabhawala/swift,shajrawi/swift,codestergit/swift,arvedviehweger/swift,bitjammer/swift,harlanhaskins/swift,felix91gr/swift,allevato/swift,deyton/swift,shajrawi/swift,tjw/swift,swiftix/swift,brentdax/swift,gmilos/swift,xwu/swift,OscarSwanros/swift,harlanhaskins/swift,tjw/swift,glessard/swift,sschiau/swift,nathawes/swift,deyton/swift,therealbnut/swift,manavgabhawala/swift,hughbe/swift,codestergit/swift,tardieu/swift,xwu/swift,alblue/swift,ben-ng/swift,austinzheng/swift,zisko/swift,allevato/swift,sschiau/swift,kstaring/swift,calebd/swift,devincoughlin/swift,rudkx/swift,gmilos/swift,OscarSwanros/swift,xedin/swift,xwu/swift,gribozavr/swift,parkera/swift,practicalswift/swift,tkremenek/swift,jopamer/swift,danielmartin/swift,huonw/swift,jmgc/swift,kstaring/swift,Jnosh/swift,gribozavr/swift,milseman/swift,ahoppen/swift,jmgc/swift,hooman/swift,Jnosh/swift,IngmarStein/swift,therealbnut/swift,return/swift,amraboelela/swift,modocache/swift,codestergit/swift,glessard/swift,hooman/swift,CodaFi/swift,jckarter/swift,apple/swift,parkera/swift,swiftix/swift,CodaFi/swift,djwbrown/swift,jckarter/swift,zisko/swift,stephentyrone/swift,tkremenek/swift,natecook1000/swift,calebd/swift,karwa/swift,rudkx/swift,bitjammer/swift,roambotics/swift,uasys/swift,OscarSwanros/swift,return/swift,deyton/swift,austinzheng/swift,uasys/swift,jmgc/swift,felix91gr/swift,jtbandes/swift,Jnosh/swift,stephentyrone/swift,zisko/swift,jckarter/swift,zisko/swift,ahoppen/swift,shahmishal/swift,brentdax/swift,shahmishal/swift,felix91gr/swift,hooman/swift,aschwaighofer/swift,jmgc/swift,gottesmm/swift,tkremenek/swift,jckarter/swift,karwa/swift,shajrawi/swift,jtbandes/swift,arvedviehweger/swift,jopamer/swift