Removed lib/FSharp and references in fsproj

It's no longer necessary to include own build of FSharp to build
on with Mono.

Also removed the nuget restore parts from the fsproj files. The
outdated nuget.targets file was failing to build on OSX and it is
not needed with nuget 2.8+
add paket
remove nuget restore packages
fix build and fsharp formatting references
Generate docs only on demand
Merge fsproj files
Remove old doc template files
Fix version number in fsproj to fix the build on os x
Merge branch 'build-on-osx'

Conflicts:
	paket.dependencies