Giant documentation cleanup

Author: Oliver Smith

CHANGES.txt

@@ -3,6 +3,8 @@ TradeDangerous, Copyright (C) Oliver "kfsone" Smith, July 2014
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 v6.1.9 [wip]
+. (kfsone) Big documentation cleanup.
+. (mhuges) Added '--stations' to 'nav' to show a station count
 . (kfsone) Added '--ages' option to 'local' to show price data age
 
 v6.1.8 Dec 09 2014