Add noframework option in AST compiler methods

[eiriktsarpalis]

I added this option to the AST compiler methods in order to work around this issue in my QuotationCompiler library.

[7sharp9]

So this removes an implicit FSharp.Core reference?

[eiriktsarpalis]

Yes, same as --noframework in fsc.exe.

[7sharp9]

@dsyme Why is there no Compile* methods in normal SourceCodeServices?

I think that the API should be normalised that way, its annoying to have to create another type to Compile when you are already using FsharpChecker in SourceCodeServices which essentially the same API.

[dsyme]

@7sharp9 - yes, it would be reasonable to bring the Compile methods into FSharpChecker. For starters that could then help ensure the same Reactor thread is used for both checking and compilation.

[dsyme]

This fix is good enough considering it only affects the compile-from-AST methods.

There is certainly duplication between the AST and compile-from-text paths which ideally should be resolved in the future, e.g. the command-line arguments governing the compilation (such as noframework) should probably come inn textual form, for uniformity with the rest of the compiler services. But that would be a different commit.

So I'm ok to merge this.

[eiriktsarpalis]

Thanks. Looking forward for a nuget package update!