Import and exports of points, performance, UI and core logic

This is a very big release preparing for the issue of the first beta version of the app. Thanks to @michielbdejong and @Vinnl who worked a lot in the past week(s)!

Core logic

Comments on points: #354, #386
Error reporting on submission of points: #358

Import

Import of points from the old database and seeding the database for local deployment.
#339, #342, #344, #351, #352, #356, #359, #364, #379

Export

Export of point towards tosdr.org.
#333, #383

Cases

Implementation of Cases a new class of Points that are recurrent over Services for consistent submission and rating.
#361, #369, #376, #385

Performances

#353 #371

GPDR

Deletion of account: #335, #349

Misc

Minor fixes: #348
UI: #365, #366, #367, #380
Better welcoming email messages: #336
Launch app with Docker: #362
Update instruction: #363
Remove "Delete Point option": #377