Allow WsdlTypeProvider to work on a fresh install of Windows 10/VS2015.
Allow WsdlTypeProvider to work on a fresh install of Windows 10/VS2015.

Replaced the nesting with a list of candidates.

Fixes #637

vasily-kirichenko/FSharp.Compiler.Service,matthid/FSharp.Compiler.Service,forki/FSharp.Compiler.Service,matthid/FSharp.Compiler.Service,dsyme/fsharp,Jand42/FSharp.Compiler.Service,fsharp/fsharp,fsharp/fsharp,dsyme/FSharp.Compiler.Service,forki/FSharp.Compiler.Service,vasily-kirichenko/FSharp.Compiler.Service,brettfo/visualfsharp,Jand42/FSharp.Compiler.Service,alfonsogarciacaro/FSharp.Compiler.Service,syeerzy/visualfsharp,dsyme/FSharp.Compiler.Service,rojepp/FSharp.Compiler.Service,dsyme/fsharp,dsyme/fsharp,cloudRoutine/FSharp.Compiler.Service,brettfo/visualfsharp,matthid/FSharp.Compiler.Service,syeerzy/visualfsharp,syeerzy/visualfsharp,BillHally/FSharp.Compiler.Service,ncave/FSharp.Compiler.Service,0x53A/FSharp.Compiler.Service,forki/FSharp.Compiler.Service,brettfo/visualfsharp,wk-j/fsharp,Heather/fsharp,dsyme/fsharp,sergey-tihon/FSharp.Compiler.Service,ncave/FSharp.Compiler.Service,brettfo/visualfsharp,rneatherway/FSharp.Compiler.Service,rojepp/FSharp.Compiler.Service,brettfo/visualfsharp,0x53A/FSharp.Compiler.Service,ncave/FSharp.Compiler.Service,rneatherway/FSharp.Compiler.Service,0x53A/FSharp.Compiler.Service,sergey-tihon/FSharp.Compiler.Service,sergey-tihon/FSharp.Compiler.Service,alfonsogarciacaro/FSharp.Compiler.Service,In2TheWild/fsharp,Jand42/FSharp.Compiler.Service,vasily-kirichenko/FSharp.Compiler.Service,cloudRoutine/FSharp.Compiler.Service,dsyme/fsharp,rojepp/FSharp.Compiler.Service,alfonsogarciacaro/FSharp.Compiler.Service,BillHally/FSharp.Compiler.Service,dsyme/FSharp.Compiler.Service,syeerzy/visualfsharp,brettfo/visualfsharp,wk-j/fsharp,fsharp/fsharp,dsyme/fsharp,dsyme/fsharp,syeerzy/visualfsharp,In2TheWild/fsharp,Heather/fsharp,syeerzy/visualfsharp,cloudRoutine/FSharp.Compiler.Service