'--noframework' parameter was added in the case when FSharp.Core.dll explicitly referenced
Fix for #502.  Make the build script args part of the --fsiargs switch the value of an environemnt variable named fsiargs-buildscriptargs.  This is the best solution to make this restricted set of args explicitly available to the build script.
Add documentation for the new --fsiargs build script arguments approach.
Merge pull request #508 from bentayloruk/fix-fsiargs

Provide env var access to --fsiargs build script args so works on FAKE 3
Release notes
Merge pull request #511 from sergey-tihon/master

FSC - support of compilation for different versions of F#
Bump version to 3.2.12
Merge branch 'master' of https://github.com/fsharp/FAKE
Release notes
Bump version to 3.2.13
Update AppVeyor.fs

Added 2 new environment variables that now existing in appveyor
Merge pull request #512 from TWith2Sugars/patch-2

Update AppVeyor.fs
Bump version to 3.2.14
Add pushd/popd to FileUtils

Adds familiar pushd and popd commands to better support recursive
directory navigation.
Merge pull request #513 from brianary/PushdPopd

Add pushd/popd to FileUtils
Bump version to 3.2.15
NuGet: support fallback framework groups

Since NuGet 2.0, dependencies and references can be specified by target
framework, where only the entries from the matching group are considered.
NuGet also allows defining a fallback group where the targetFramework is
missing, which is used if none of the other groups match.

Previously FAKE did emit the empty targetFramework attribute, which causes
NuGet to complain. This change skipts the attribute if its value is null
or empty, in compliance with the nuget specs.
Merge pull request #514 from cdrnet/nuget-fallbackFrameworkGroup

NuGet: support fallback framework groups
Bump version to 3.2.16
Don't crash during tool discovery - #167