suggestion: use --robot by default and ask the user for confirmation about dependencies

[pescobar]

I think it would be a nice usability improvement, specially for newcomers to easybuild, to use the option --robot by default, show the dependencies that are required and then ask the user for confirmation before going on. Adding an extra flag "-y" to avoid confirmation would still allow to do automatic non-interactive installations.

I think most package managers (yum, apt, pacman) behave like this...

[boegel]

How about this:

• --robot remains disabled by default, but EasyBuild warn about being able to resolve dependencies (if it can, via the default robot path), and asks whether it should continue (mentioning to enable --robot to avoid this question being asked)
• --robot is then already the equivalent of -y

I'm not convinced that i) automagic dependency resolution should be enabled by default, and ii) that users would like having to always override the robot question with -y.

For user-friendliness, it would be awesome if eb suggests the user to use --robot if it notices ti can resolve dependencies, rather than failing hard without any clue as to how to fix it.