Define Additions

New defines added for features in v8, as well as some define changes to
reflect code changes (eg. floats -> doubles)
Operations update for v9

Some bugs fixed and behaviors modified, check AuI.h for all changes.
DangerPlots update for v9

Majors can now "see" barbarians in revealed plots for the purposes of
calculating danger (knowledge cheat to prevent settlers from being taken
so easily).
Worker Automation update for v9

Some bugs fixed, earlier modifications tweaked, and new modifications
added to value tile yields based on flavor, check AuI.h for more
details.
Grand Strategy update for v9

Most of the changes are unactivated code for a WIP newer way to
calculate grand strategy priority, otherwise it's just a switch from
floats to doubles and smaller modifications.
Minor Civ Ratio in Doubles

Switches the Minor Civ Ratio calculating functions to return doubles
instead of floats.
Voting Classes update for v9

Most of the changes are just migrations from floats to doubles, check
AuI.h for full detail.
Class now uses A* road filter

If the AStar class has the road filter function enabled (new in v8 and
v9), this class will now use it.
MilitaryAI update for v9

New functions and swapped from using floats to doubles, check AuI.h for
all the new additions.
Unit update for v9

Smart AI functions optimized, switch from using floats to doubles for
promotion evaluation, and lots of new functions added, check AuI.h for
all changes.