moved the entries up one folder, added the folder to the keywords

games/space_opera.md

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+# Space Opera
+
+_Space colonization game similar to 'Master of Orion' or 'Galactic Civilizations'._
+
+- Home: https://sourceforge.net/projects/spaceopera/, http://spaceopera.sourceforge.net/
+- State: beta, inactive since 2008
+- Download: https://sourceforge.net/projects/spaceopera/files
+- Keywords: strategy
+- Code repository: https://gitlab.com/osgames/spaceopera.git (backup of svn), https://svn.code.sf.net/p/spaceopera/code/ (svn)
+- Code language: Java
+- Code license: GPL-2.0
+
+## Building
+