Add Lua API function SetAmmoTexts (see issue #82)

Update Changelog: Add Racer and TechRacer updates

TechRacer: Cleanup mess regarding teams which did not finish

Fix some incorrect TechRacer messages

TechRacer: Show racing times and ranking in stats screen

Force TechRacer maps when image map is selected. Fixes Google Code issue #882 If you start a TechRacer map with an image map selected, the resulting map will likely to be completely unplayable. So this commit disables this.

TechRacer: Don't mess with ammo caption while in waypoint. Fixes Google Code issue #883.

Clean up TechRacer strings

Racer: Reduce minimum number of waypoints to 2, tweak descriptions

Racer: Clean up “did not finish” mess

Add new Racer script parameter: waypointradius

Racer: Dump old commented-out code

Racer: Show “Track completed!” message

Add “rounds” script parameter for Racer

Racer: Don't mess with ammo display when touching waypoint

Racer: Clean up strings

Implement stats screen for Racer

Add “boring” voice to voice queue to avoid voice overlapping

Enable timer warning sounds in hog placement phase

Add changelog entries for the timer color-coding and countdown sounds

When doing something, set ready time to 0 instead of 1

Fix sniper rifle making timer gray all the time

Show timer at 999s instead of 1000s

Make timer gray while the time is not running or while it is paused