Add non-const operator-> and operator* overloads to Optional.
Add non-const operator-> and operator* overloads to Optional.

Swift SVN r846

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