Support for multi-project build

[eximius313]

I created inner project using guidelines from Documentation Project compiles under SBT and runs correctly, but when I invoke eclipse it:

1. Doesn't honor EclipseKeys.withSource := false and EclipseKeys.withJavadoc := false for subproject (it downloads it anyway)
2. In Eclipse folder containing source of a subproject is not being added into Source folder in Build Path
3. Dependencies for subproject are not being imported into Eclipse despite aggregate(backend).dependsOn(backend)

[hamzayoucefkaced]

Hi, any updates on this since the time of writing?