add roadmap, update new_project template

Templates/features_roadmap.md

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+## MVP Requirements
+- [ ] Minimum to get working
+- [ ] Once completed, release for feedback (eg: co-workers or selected 3rd party users)
+
+## Alpha Requirements
+- [ ] Main focus is to have most of the expected functionalities working  
+- [ ] First actual useful state for public release
+- [ ] Once completed, increases feedback pool (eg: pilot group)
+
+## Beta Requirements
+- [ ] Main focus is to have a working system
+- [ ] Entire Front and Backend logic and usability should be completed at the end
+- [ ] Once completed, limited release to public registration
+
+## Release / Stable Requirements
+- [ ] Final release
+- [ ] UIX should be completed at this stage
+- [ ] Most new updates are mainly hotfixes, bugfixes or similar
+- [ ] From now on, new features are considered they own new project
+
+## Unplanned
+- [ ] Things that are nice to have, but not planned, at all