don't hardcode SHIFT modifier for backwards tab cycle

closes #4144
add audio feedback on mouse-wheel and hotkey build palette cycle
added a new hotkey to cycle production buildings except conyards
update CHANGELOG
Fix initial experience granting.
Improve rank chevron positioning. Closes #4196.
Merge pull request #4261 from pchote/rank-fix

Veterency fixes
credit all thirdparty libraries
only tab-indent hierarchy

don't align because this differs per editor configuration
make install SDL2
add missing FreeType 2 dependency to RPM

http://pkgs.org/download/freetype2
we don't ship non-managed code anymore
Silently ignore bogus prerequisites instead of crashing. Fixes #4225.
Fix StyleCop issues in TechTree.
Merge pull request #4258 from Mailaender/packaging-corrections

Packaging Script Corrections
Remove PerCell damage from C&C.

Fixes bogus nuke damage.
Merge pull request #4263 from ScottNZ/lua

Small Lua cleanup
fixed crash when disguising the spy
Merge pull request #4262 from pchote/prereq-crash-fix

Prerequisites crash fix.
Merge pull request #4265 from Mailaender/allies04-quickfix

Fixed crash when disguising the spy as an infantry without stand2 animations