Ignore doc/doxygen/html in older versions of git.

The ** syntax is introduced in a newer version of git.
remove unused portrait function from unit

This function was entirely unused, and deleting it allows us to
remove the "portrait.hpp" include from the unit.hpp header. (!)
remove unnecessary resources.hpp include from unit.hpp

It turned out that alot of compilation units were using resources
but not including the header, and only getting circuitously
through the display.hpp header which got it from unit.hpp. This
is an improvement since unit itself doesn't need the header,
and most classes probably don't either.
move formula ai features of unit to a unit formula manager

This use of handle-body idiom saves *alot* of includes, since a
huge number of objects include unit indirectly, and make no use
of the ai formula features.
Update Xcode project
Fix new get_relative_dir code translation issue
delete duplicated set_team fcn

game_display and display versions of set_team were identical, in
header and in implementation, so we simply delete the game_display
one, as a strict refactor.
fixup segfaults in replay viewer

After this commit e4eb0a3ede83ee338994708ebd48257627b47242 the
replay viewer would segfault during prestart events. However, it
turns out that nothing in the replay viewer, or in that commit,
was directly causing the segault. Instead, the display object
was holding dangling pointers for no reason, when it could have.
been simply computing the correct value (very cheaply). We clean
up the code in the display objects to fix the segfault.
Merge branch 'master' of git://github.com/wesnoth/wesnoth
disable a unit test which was broken

This test was broken in this commit
342ff4f718d678bea50419f11ad7d9a6ad1e7d58

We need to rerun the characterization to test to get the new
correct values, or it will fail. I'm disabling in the meantime.
Add framework of strategy_formulation_with_rca stage
Register the new stage and update build files
Add simulation flag

minor bugfix

Add simulation flag
Fix bugs in strategy_formulation_with_rca
Add simulated actions
Add debug log stream to actions simulation
Fix bug and style of simulated actions
Use maxmin inside set_optimal_strategy()
Update simulate_states_ahead according to maxmin
Change log stream in strategy_formulation_with_rca