Upgraded apr-util to 1.5.1

Signed-off-by: Sven Strickroth <email@cs-ware.de>
Fixed some warnings

Signed-off-by: Sven Strickroth <email@cs-ware.de>
Require the Win7 SDK & drop glue code

Based on TortoiseSVN revision #24147.

Signed-off-by: Sven Strickroth <email@cs-ware.de>
TortoiseGitMerge: It makes more sense to use left/right arrows for inline diff buttons

Signed-off-by: Sup Yut Sum <ch3cooli@gmail.com>