Upgrade FAKE to version 4.1.0

Altered build command to install 4.1.0
Added .fake/ directory to .gitignore. Directory contains build artifacts.
Removed Fake 3.17.0 from packages.config as build.cmd dicates version.

.gitignore

@@ -214,3 +214,6 @@ FakesAssemblies/
 /src/.Akka.boltdata/TestResults.json
 resetdev.bat
 /src/packages/repositories.config
+
+# FAKE build folder
+.fake/

build.cmd

@@ -4,12 +4,12 @@ pushd %~dp0
 
 src\.nuget\NuGet.exe update -self
 
-src\.nuget\NuGet.exe install FAKE -ConfigFile src\.nuget\Nuget.Config -OutputDirectory src\packages -ExcludeVersion -Version 3.28.8
+src\.nuget\NuGet.exe install FAKE -ConfigFile src\.nuget\Nuget.Config -OutputDirectory src\packages -ExcludeVersion -Version 4.1.0
 
 src\.nuget\NuGet.exe install xunit.runner.console -ConfigFile src\.nuget\Nuget.Config -OutputDirectory src\packages\FAKE -ExcludeVersion -Version 2.0.0
 src\.nuget\NuGet.exe install nunit.runners -ConfigFile src\.nuget\Nuget.Config -OutputDirectory src\packages\FAKE -ExcludeVersion -Version 2.6.4
 
-if not exist src\packages\SourceLink.Fake\tools\SourceLink.fsx ( 
+if not exist src\packages\SourceLink.Fake\tools\SourceLink.fsx (
   src\.nuget\nuget.exe install SourceLink.Fake -ConfigFile src\.nuget\Nuget.Config -OutputDirectory src\packages -ExcludeVersion
 )
 rem cls
@@ -17,4 +17,4 @@ rem cls
 set encoding=utf-8
 src\packages\FAKE\tools\FAKE.exe build.fsx %*
 
-popd
+popd

src/.nuget/packages.config

@@ -1,4 +1,3 @@
 <?xml version="1.0" encoding="utf-8"?>
 <packages>
-  <package id="FAKE" version="3.17.0" />
-</packages>
+</packages>