The build script generated URL names as a function of the "flavor names". Now I defined explicit array for URL names so it can be easily changed.

I thought that this is acceptable since we have these "strict dependencies". Nevertheless, a quick PR to modify the [build script](https://github.com/kaptoxic/scala-ide-insynth-integration/blob/changesForEcosystem/ch.epfl.insynth.build/ecosystem-build.sh#L3) (to change URLs) is always possible. I am open to your suggestions.