-Implemented setting of empire count statistics.
-Replaced Count statistic value ref for ship count graph with the new ShipDesignsOwned complex valueref.

git-svn-id: svn://svn.code.sf.net/p/freeorion/code/trunk@7684 dbd5520b-6a0a-0410-a553-f54834df5b05
-Switched fleet and colony upkeep cost macros to use new complex valuerefs to empire counts instead of recalculating the Count statistic each time they are evaluated.
-Grooming of shared_macros.txt.
-Fixed parsed names of some newly-added valuerefs.

git-svn-id: svn://svn.code.sf.net/p/freeorion/code/trunk@7685 dbd5520b-6a0a-0410-a553-f54834df5b05