third GDI mission recreated in Lua
launch a Nod attack after 15 seconds
Increase cost of DOME from 1600 to 1800

Just move this slightly later, and make DOME-first rushes a bit more
risky.
fixed music player image button mouse over highlight
Updated building descriptions.
Make Allied and Soviet factions build general-purpose mines instead of AT and AP mines.
Update CHANGELOG for mine changes
Overhaul ingame timer displays. Fixes #3062.
Remove World.FrameNumber.
Fix Sound coding style nits.
Add a new RA AttackMove cursor by @pizzaoverhead.
Add a new TD AttackMove cursor.
Add a new TD guard cursor.
Add new TD goldwrench / capture cursors.
Add a new attackoutsiderange cursor to TD.
Remove TD dependency on the RA cursors.
Clean up AttackCharge.
Clean up AttackOmni.
Clean up AttackPopupTurreted.
Fix style nits in other Attack traits (no logic changes).