Small improvements

[chucklu]

1. ignore the .vs folder
2. add try catch to avoid program crash

Application: de4dot.exe
Framework Version: v4.0.30319
Description: The process was terminated due to an unhandled exception.
Exception Info: System.IO.IOException
at dnlib.IO.MemoryMappedFileStreamCreator+Windows.Mmap(dnlib.IO.MemoryMappedFileStreamCreator, Boolean)
at dnlib.IO.MemoryMappedFileStreamCreator.CreateWindows(System.String, Boolean)
at dnlib.IO.ImageStreamCreator.CreateMemoryMappedFileStreamCreator(System.String, Boolean)
at dnlib.IO.ImageStreamCreator.Create(System.String, Boolean)
at dnlib.PE.PEImage..ctor(System.String, Boolean, Boolean)
at dnlib.DotNet.MD.MetaDataCreator.Load(System.String)
at de4dot.code.ObfuscatedFile.LoadModule(System.Collections.Generic.IEnumerable1<de4dot.code.deobfuscators.IDeobfuscator>) at de4dot.code.ObfuscatedFile.Load(System.Collections.Generic.IList1<de4dot.code.deobfuscators.IDeobfuscator>)
at de4dot.cui.FilesDeobfuscator+DotNetFileLoader.Add(de4dot.code.IObfuscatedFile, Boolean, Boolean)
at de4dot.cui.FilesDeobfuscator+DotNetFileLoader+d__5.MoveNext()
at de4dot.cui.FilesDeobfuscator+d__11.MoveNext()
at System.Collections.Generic.List1[[System.__Canon, mscorlib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089]]..ctor(System.Collections.Generic.IEnumerable1<System.__Canon>)
at de4dot.cui.FilesDeobfuscator.DeobfuscateAll()
at de4dot.cui.FilesDeobfuscator.DoIt()
at de4dot.cui.Program.Main(System.String[])
at de4dot_x86.Program.Main(System.String[])

[chucklu]

Another suggestion is add how to sync submodule in readme.md.

Pull git submodules after cloning project from GitHub
From the root of the repo just run:
git submodule update --init