Import Milestones with projects into Scenario Planner

[#1]

In many long term projects, resources are allocated very differently in different phases. We use milestones for those phases. If the milestones came in with the project import or if we could add those milestones and be able to allocate resources separately to each milestones it would make the scenario planner exponentially more useful. We would then be able to have a fairly accurate picture to be able to predict resource allocation needs.