[stdlib] Eliminate OptionSetDispatchType
[stdlib] Eliminate OptionSetDispatchType

Iteration N+1 of the default implementations hack applied!
Also clean up the code voice in many comments.

Swift SVN r28895

gregomni/swift,Ivacker/swift,benlangmuir/swift,lorentey/swift,natecook1000/swift,arvedviehweger/swift,gmilos/swift,Ivacker/swift,shahmishal/swift,frootloops/swift,manavgabhawala/swift,MukeshKumarS/Swift,kstaring/swift,sdulal/swift,kperryua/swift,sdulal/swift,felix91gr/swift,tardieu/swift,sdulal/swift,allevato/swift,devincoughlin/swift,mightydeveloper/swift,OscarSwanros/swift,JaSpa/swift,hughbe/swift,adrfer/swift,lorentey/swift,glessard/swift,devincoughlin/swift,uasys/swift,khizkhiz/swift,slavapestov/swift,practicalswift/swift,airspeedswift/swift,tkremenek/swift,IngmarStein/swift,kstaring/swift,karwa/swift,JGiola/swift,atrick/swift,felix91gr/swift,apple/swift,xedin/swift,return/swift,return/swift,slavapestov/swift,swiftix/swift,apple/swift,apple/swift,JaSpa/swift,johnno1962d/swift,gregomni/swift,dreamsxin/swift,MukeshKumarS/Swift,LeoShimonaka/swift,jckarter/swift,IngmarStein/swift,zisko/swift,hooman/swift,shajrawi/swift,codestergit/swift,benlangmuir/swift,slavapestov/swift,cbrentharris/swift,ken0nek/swift,calebd/swift,huonw/swift,austinzheng/swift,deyton/swift,natecook1000/swift,swiftix/swift.old,KrishMunot/swift,djwbrown/swift,swiftix/swift,tkremenek/swift,uasys/swift,OscarSwanros/swift,LeoShimonaka/swift,JaSpa/swift,zisko/swift,xwu/swift,ken0nek/swift,amraboelela/swift,tardieu/swift,emilstahl/swift,xwu/swift,amraboelela/swift,mightydeveloper/swift,tardieu/swift,ben-ng/swift,aschwaighofer/swift,gottesmm/swift,swiftix/swift.old,uasys/swift,shajrawi/swift,johnno1962d/swift,johnno1962d/swift,amraboelela/swift,KrishMunot/swift,JGiola/swift,alblue/swift,ben-ng/swift,codestergit/swift,alblue/swift,djwbrown/swift,OscarSwanros/swift,ken0nek/swift,glessard/swift,practicalswift/swift,modocache/swift,therealbnut/swift,modocache/swift,parkera/swift,jckarter/swift,kperryua/swift,huonw/swift,JGiola/swift,jckarter/swift,zisko/swift,shahmishal/swift,practicalswift/swift,zisko/swift,sdulal/swift,gottesmm/swift,slavapestov/swift,airspeedswift/swift,milseman/swift,lorentey/swift,rudkx/swift,roambotics/swift,sschiau/swift,rudkx/swift,alblue/swift,emilstahl/swift,swiftix/swift.old,SwiftAndroid/swift,airspeedswift/swift,ken0nek/swift,tinysun212/swift-windows,bitjammer/swift,airspeedswift/swift,therealbnut/swift,rudkx/swift,gribozavr/swift,IngmarStein/swift,russbishop/swift,hooman/swift,practicalswift/swift,gmilos/swift,emilstahl/swift,kperryua/swift,allevato/swift,felix91gr/swift,natecook1000/swift,devincoughlin/swift,emilstahl/swift,SwiftAndroid/swift,tjw/swift,hooman/swift,karwa/swift,calebd/swift,natecook1000/swift,return/swift,MukeshKumarS/Swift,apple/swift,benlangmuir/swift,kentya6/swift,dduan/swift,adrfer/swift,practicalswift/swift,sdulal/swift,khizkhiz/swift,JGiola/swift,austinzheng/swift,xwu/swift,practicalswift/swift,SwiftAndroid/swift,hughbe/swift,mightydeveloper/swift,modocache/swift,kusl/swift,MukeshKumarS/Swift,tjw/swift,karwa/swift,gribozavr/swift,SwiftAndroid/swift,therealbnut/swift,manavgabhawala/swift,shahmishal/swift,uasys/swift,mightydeveloper/swift,LeoShimonaka/swift,adrfer/swift,hughbe/swift,zisko/swift,harlanhaskins/swift,amraboelela/swift,sdulal/swift,rudkx/swift,russbishop/swift,glessard/swift,benlangmuir/swift,tinysun212/swift-windows,milseman/swift,milseman/swift,milseman/swift,gottesmm/swift,gregomni/swift,adrfer/swift,airspeedswift/swift,atrick/swift,ahoppen/swift,mightydeveloper/swift,tkremenek/swift,cbrentharris/swift,shahmishal/swift,MukeshKumarS/Swift,ken0nek/swift,sschiau/swift,huonw/swift,allevato/swift,uasys/swift,benlangmuir/swift,parkera/swift,calebd/swift,xedin/swift,adrfer/swift,tardieu/swift,Jnosh/swift,kusl/swift,IngmarStein/swift,gmilos/swift,dduan/swift,kentya6/swift,stephentyrone/swift,frootloops/swift,aschwaighofer/swift,russbishop/swift,kentya6/swift,Ivacker/swift,milseman/swift,gribozavr/swift,Jnosh/swift,gmilos/swift,danielmartin/swift,deyton/swift,jmgc/swift,jtbandes/swift,gregomni/swift,hooman/swift,manavgabhawala/swift,bitjammer/swift,roambotics/swift,johnno1962d/swift,xwu/swift,MukeshKumarS/Swift,kentya6/swift,modocache/swift,CodaFi/swift,kstaring/swift,uasys/swift,SwiftAndroid/swift,gottesmm/swift,glessard/swift,jckarter/swift,stephentyrone/swift,manavgabhawala/swift,danielmartin/swift,arvedviehweger/swift,IngmarStein/swift,mightydeveloper/swift,deyton/swift,apple/swift,gribozavr/swift,nathawes/swift,dreamsxin/swift,devincoughlin/swift,slavapestov/swift,cbrentharris/swift,arvedviehweger/swift,bitjammer/swift,natecook1000/swift,deyton/swift,Jnosh/swift,OscarSwanros/swift,apple/swift,tinysun212/swift-windows,stephentyrone/swift,uasys/swift,rudkx/swift,stephentyrone/swift,stephentyrone/swift,nathawes/swift,sschiau/swift,xedin/swift,manavgabhawala/swift,huonw/swift,Jnosh/swift,kstaring/swift,LeoShimonaka/swift,djwbrown/swift,nathawes/swift,sschiau/swift,JaSpa/swift,hughbe/swift,zisko/swift,xedin/swift,IngmarStein/swift,aschwaighofer/swift,karwa/swift,natecook1000/swift,xedin/swift,hooman/swift,kperryua/swift,LeoShimonaka/swift,emilstahl/swift,atrick/swift,jtbandes/swift,parkera/swift,gmilos/swift,CodaFi/swift,cbrentharris/swift,brentdax/swift,parkera/swift,jtbandes/swift,zisko/swift,nathawes/swift,parkera/swift,return/swift,CodaFi/swift,devincoughlin/swift,codestergit/swift,slavapestov/swift,xedin/swift,therealbnut/swift,glessard/swift,ben-ng/swift,jopamer/swift,milseman/swift,shajrawi/swift,shajrawi/swift,therealbnut/swift,hughbe/swift,KrishMunot/swift,karwa/swift,xwu/swift,russbishop/swift,jopamer/swift,austinzheng/swift,brentdax/swift,Ivacker/swift,stephentyrone/swift,kusl/swift,swiftix/swift,benlangmuir/swift,Jnosh/swift,KrishMunot/swift,danielmartin/swift,atrick/swift,return/swift,nathawes/swift,MukeshKumarS/Swift,cbrentharris/swift,ken0nek/swift,Ivacker/swift,kentya6/swift,harlanhaskins/swift,atrick/swift,karwa/swift,dduan/swift,hooman/swift,jtbandes/swift,khizkhiz/swift,kperryua/swift,roambotics/swift,stephentyrone/swift,CodaFi/swift,karwa/swift,khizkhiz/swift,gottesmm/swift,swiftix/swift.old,KrishMunot/swift,xedin/swift,jopamer/swift,adrfer/swift,huonw/swift,tinysun212/swift-windows,OscarSwanros/swift,jmgc/swift,gribozavr/swift,parkera/swift,codestergit/swift,therealbnut/swift,jtbandes/swift,hughbe/swift,kstaring/swift,jmgc/swift,kusl/swift,swiftix/swift.old,bitjammer/swift,tjw/swift,jopamer/swift,gribozavr/swift,swiftix/swift.old,tjw/swift,jopamer/swift,Ivacker/swift,JGiola/swift,shajrawi/swift,mightydeveloper/swift,return/swift,alblue/swift,karwa/swift,arvedviehweger/swift,jtbandes/swift,gregomni/swift,amraboelela/swift,cbrentharris/swift,deyton/swift,allevato/swift,manavgabhawala/swift,codestergit/swift,gregomni/swift,LeoShimonaka/swift,OscarSwanros/swift,johnno1962d/swift,felix91gr/swift,austinzheng/swift,emilstahl/swift,tkremenek/swift,felix91gr/swift,felix91gr/swift,xedin/swift,jckarter/swift,rudkx/swift,harlanhaskins/swift,allevato/swift,johnno1962d/swift,alblue/swift,swiftix/swift,ahoppen/swift,lorentey/swift,glessard/swift,parkera/swift,manavgabhawala/swift,dduan/swift,swiftix/swift,kusl/swift,swiftix/swift.old,kentya6/swift,ken0nek/swift,bitjammer/swift,shajrawi/swift,danielmartin/swift,aschwaighofer/swift,roambotics/swift,jtbandes/swift,alblue/swift,CodaFi/swift,gottesmm/swift,djwbrown/swift,austinzheng/swift,Ivacker/swift,kusl/swift,austinzheng/swift,Jnosh/swift,arvedviehweger/swift,sdulal/swift,CodaFi/swift,shahmishal/swift,jopamer/swift,cbrentharris/swift,adrfer/swift,amraboelela/swift,tjw/swift,arvedviehweger/swift,codestergit/swift,IngmarStein/swift,modocache/swift,ahoppen/swift,tkremenek/swift,sdulal/swift,devincoughlin/swift,brentdax/swift,gribozavr/swift,shahmishal/swift,aschwaighofer/swift,harlanhaskins/swift,russbishop/swift,KrishMunot/swift,arvedviehweger/swift,allevato/swift,ben-ng/swift,huonw/swift,practicalswift/swift,lorentey/swift,lorentey/swift,austinzheng/swift,johnno1962d/swift,lorentey/swift,JaSpa/swift,kentya6/swift,tkremenek/swift,shahmishal/swift,airspeedswift/swift,danielmartin/swift,roambotics/swift,shahmishal/swift,danielmartin/swift,khizkhiz/swift,huonw/swift,aschwaighofer/swift,shajrawi/swift,brentdax/swift,sschiau/swift,emilstahl/swift,atrick/swift,ahoppen/swift,jckarter/swift,sschiau/swift,KrishMunot/swift,JaSpa/swift,tjw/swift,codestergit/swift,amraboelela/swift,tjw/swift,therealbnut/swift,frootloops/swift,modocache/swift,airspeedswift/swift,deyton/swift,CodaFi/swift,calebd/swift,SwiftAndroid/swift,LeoShimonaka/swift,SwiftAndroid/swift,felix91gr/swift,jmgc/swift,djwbrown/swift,jopamer/swift,frootloops/swift,dduan/swift,jmgc/swift,tinysun212/swift-windows,cbrentharris/swift,roambotics/swift,xwu/swift,harlanhaskins/swift,swiftix/swift,frootloops/swift,jmgc/swift,nathawes/swift,brentdax/swift,brentdax/swift,khizkhiz/swift,practicalswift/swift,tinysun212/swift-windows,mightydeveloper/swift,jckarter/swift,sschiau/swift,swiftix/swift.old,kstaring/swift,dduan/swift,kusl/swift,jmgc/swift,JaSpa/swift,brentdax/swift,frootloops/swift,parkera/swift,tkremenek/swift,ben-ng/swift,devincoughlin/swift,djwbrown/swift,tardieu/swift,harlanhaskins/swift,LeoShimonaka/swift,allevato/swift,kperryua/swift,lorentey/swift,Jnosh/swift,deyton/swift,swiftix/swift,slavapestov/swift,khizkhiz/swift,bitjammer/swift,gmilos/swift,natecook1000/swift,ben-ng/swift,alblue/swift,nathawes/swift,ahoppen/swift,calebd/swift,modocache/swift,OscarSwanros/swift,hughbe/swift,frootloops/swift,aschwaighofer/swift,tardieu/swift,devincoughlin/swift,sschiau/swift,russbishop/swift,tardieu/swift,emilstahl/swift,milseman/swift,JGiola/swift,kusl/swift,xwu/swift,harlanhaskins/swift,shajrawi/swift,ben-ng/swift,ahoppen/swift,bitjammer/swift,gottesmm/swift,kstaring/swift,calebd/swift,djwbrown/swift,gribozavr/swift,kentya6/swift,gmilos/swift,hooman/swift,danielmartin/swift,kperryua/swift,calebd/swift,return/swift,russbishop/swift,tinysun212/swift-windows,Ivacker/swift,dduan/swift