Includes a workaround for a type collision when using NUnit3's .Net 2.0
build on .Net 3.5, see nunit/nunit#1349 for details.
Leverage Paket file-dependencies for FsUnit instead of NuGet packages
since it makes sense and the FsUnit NuGet package no longer supports
.Net 3.5. Partially migrate to FsUnitTypes where possible.
Since every unit test file had to be touched anyway, also fixes file headers
where they were broken.
No longer commit packages folder (.gitignore). Use restore.cmd to restore.
Christoph Ruegg