Fix a bunch of typos: syced -> synced

This commit is the result of running this command in src/ directory:
git grep -lz 'syced' | xargs -0 perl -i'' -pE "s/syced/synced/g"

Thank you stackoverflow :)
http://stackoverflow.com/questions/1583219/awk-sed-how-to-do-a-recursive-find-replace-of-a-string

(I used the "git safe" version)
fix replay of delayed shroud updates (21986)

we have to enable the undo stack during replays to make these work. This
was accidently disabled during pr 121.
fix linger mode in mp (21985)
save replaydata of the undostack

not saving these might result in currupt replays when redoing a move
from a saved game.
Reallow selection of another unit on same side without deselect first
Simplify condition check for mouse action/move.
Remove accidentally committed windows binary
fixup test directory

C++ tests load from /data/test/ again, and the _main includes in
data/ and data/test/ are fixed up to accomodate this.

This fixes up cc138a4ed96f3ac1f8c5130aa6842d1429013da4
fixup run_wml_tests

Prev version could sometimes give an error if test timed out and
error.log was not created, so add a check for if error.log exists.

Also refactor so the error log handling is in its own function.
Merge branch 'master' of git://github.com/wesnoth/wesnoth
fixup gui2 unit tests

The file test_gui2.cpp was causing segfaults in the debug build,
gfgtdf spotted the cause: a function was returning references to
local variables. It was most likely a minor oversight, as many
similar functions nearby made these variables static. This commit
makes those local variables static and appears to fix the crash.

Relevant irc chat: http://www.wesnoth.org/irclogs/2014/05/%23wesnoth-dev.2014-05-13.log