stdlib/Dictionary: convert some 'var's to 'let's
stdlib/Dictionary: convert some 'var's to 'let's

Swift SVN r21835

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