README: almost a README now

.editorconfig

@@ -1,4 +1,11 @@
-[*.cs]
+[*]
+guidelines = 80
+end_of_line = lf
+insert_final_newline = true
+charset = utf-8-bom
+
+[*.cs]
+guidelines = 80, 120
 
 # IDE0021: Use block body for constructors
 csharp_style_expression_bodied_constructors = when_on_single_line

README.md

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-# EDNA
+# EDNA – An Elite Dangerous System Data Library
 
-FIXXME
+EDNA is a library for third party apps that want to access data about star
+systems, stations and CMDRs of the game Elite Dangerous. It can query
+[EDSM](https://edsm.net), [Spansh](https://spansh.uk) and
+[EDTS](http://edts.thargoid.space) for data.
+
+The general idea is that you usually do not care _where_ your data comes from,
+so this will get it for you wherever it can depending on data availability and
+API features.
+
+**THIS IS A HEAVY WIP PROJECT AND *NOT* READY FOR PRODUCTION USE.** Just saying.
+
+## Why EDNA⁈
+
+Why not. I find it quite funny that most Elite-related project are 4 letter
+acronyms starting with “ED”. So I stuck to that, and I had just played “Edna &
+Harvey: The Breakout” with the kids. It’s not actually an acronym though because
+I couldn’t come up with a meaning for NA.
 
 ## TODO for first proper release
 
-- [ ] README
+- [x] README
 - [ ] Documentation
 - [ ] Spansh API
+  - [ ] system data
+  - [ ] nearest system
+  - [ ] station data
+    - [ ] outdated stations
+    - [ ] rest (probably out of scope for now)
 - [ ] EDSM API
+  - [x] Systems
+  - [x] Logs (CMDR data)
+  - [ ] Stations (probably out of scope for now)
 - [x] EDTS API
+  - [x] system position
+- [ ] convenience layer / unification
+- [ ] sanity check / refactoring
 - [ ] nuget package
 - [ ] Github Actions build / package automation