additions from osgameclones, maintenance on keywords, backlog reduced partly moved to GH issues

entries/command_series_engine.md

@@ -0,0 +1,11 @@
+# Command Series Engine
+
+- Home: https://github.com/pwiecz/command_series
+- Inspiration: Conflict in Vietnam, Crusade in Europe, Decision in the Desert
+- State: mature
+- Keyword: remake, strategy, content original required + commercial, engine
+- Code repository: https://github.com/pwiecz/command_series.git
+- Code language: Go
+- Code license: GPL-2.0
+
+## Building