Added back Prev/Next page buttons to backpack

Also trimmed trailing space from itemselectionpanel.res for some reason.
Miscellaneous fixes/tweaks
June 11th TF2 update stuff

Fixes Eureka Effect hud not appearing, scoreboard being broken, etc.
Committing stock Eureka Effect HUD files

base_active_teleport_target.res, base_unavailable_teleport_target.res,
hudmenueurekaeffect.res
F-HUD-styled Eureka Effect HUD

Pipboy to come soon.
Attempted to fix alignment stuff for build menus

Still a bit weird.
Committing stock Pipboy Eureka Effect HUD files
F-HUD-styled Pipboy Eureka Effect HUD
Merge pull request #7 from FlaminSarge/master

Update Scoreboard, Building HUDs, other stuff for June 11 2014 Patch