Update SpecFlowHelper to search for tools folder

Changed default SpecFlowHelper ToolPath to search sub folders for the correct tools directory so you don't have to change this for each new version of SpecFlow.  Works same as NUnit.
Update SpecFlowHelper to search for tools folder

Fixed initial change to include toolname variable.
Merge pull request #496 from ssteward54/patch-2

Update SpecFlowHelper to search for tools folder
Updating ReleaseNotes
Bump version to 3.1.2
BREAKING CHANGE: API for CreateAssemblyInfoWithConfig was set back to original version

This resets the breacking change introduced in https://github.com/fsharp/FAKE/pull/471
Merge branch 'master' of https://github.com/fsharp/FAKE
fix compile error
Merge branch 'master' of https://github.com/fsharp/FAKE
Bump version to 3.2.0
Fix typo in ReleaseNotes
Shorter readme
FAKE is only used in OctoKit.NET
FAKE is only used in OctoKit.NET
start AppVeyor and SourceLink support
added NUnit process-model support (NUnit process parameter)
Merge pull request #348 from matthid/nunitprocessmodel

added NUnit process-model support (NUnit process parameter)
NUnit Domain and StopOnError options
Merge pull request #349 from matthid/nunitparams

NUnit NoThread, Domain and StopOnError parameters
Added functions to write and delete from registry