Update progress and extra works in M1.5, added extra goals into M1.6 and M2
Update the progress of M1.5
Updated Project Roadmap (markdown)
Rename P2 M1/M2 to M4/M5
Update M1.5 and M2a - add WM -> EM path
Update M1.5, M1.6, M2a, and M3
Add missing milestones into roadmap
Add M1.6 for EEE
Complete M1, Start M1.5, Promote P2M4, P2M5, P3M7 and P3M10 to M1.X
Updated Milestone Roadmap (markdown)