Proposed MVP feature list

Based on #262, I propose that the following features are our MVP features:
+ [x] Easily ***capture*** text #234
+ [ ] Mark text as 'note' or 'task'
+ [x] ***View*** all items on your list
+ [x] ***Complete*** a task
+ [x] ***Reorder*** items for a _prioritised list_ - this isn't _specifically_ on anyone's list, but I feel that the app will be unusable without this in the short term (until we have scheduling and goals)
+ [x] ***Track*** time against an item/start and stop timers #265
+ [ ] ***Categorise*** items (at any point in the workflow) #235 + #245
+ [x] ***Sign in*** so that there is an individual view of the to-do list (this will also enable all future team functionality so it would be useful to have and it would be good if items in our db have owners from the very beginning.
+ [x] ***Welcome email*** sent, as per #267 and https://github.com/dwyl/app/issues/266#issuecomment-582010034

_NB. PWA is not an MVP feature._

@nelsonic @SimonLab @RobStallion @LuchoTurtle Have I missed out anything critical? Have I included something totally expendable?

My next step is to put together a proposed UI for these. #261

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For me, the next key features are filtering, analysis, scheduling and goals.