descriptions of entries checked and either incorporated to keywords and inspirations or redundancies removed

entries/project_alexandria.md

@@ -3,7 +3,7 @@
 - Home: http://www.sixthfloorlabs.com/projects/alexandria/
 - State: beta, inactive since 2007
 - Download: http://www.sixthfloorlabs.com/files/
-- Keyword: arcade, open content
+- Keyword: arcade, open content, space
 - Code repository: @see-download
 - Code language: Python
 - Code license: ? (GPL version?)
@@ -11,6 +11,4 @@
 - Assets license: ? (GPL)
 - Developer: Sixth Floor Labs
 
-Space combat game.
-
 ## Building