change the UILabel color in the titlebar.
implement i18n of bonus module.
loading gift image with image url
implement gift image cache(save and load)
implement bonus information cache(load and save)
fix some code error.
Merge branch 'feature-bonus-cache' into develop
Merge branch 'develop' of https://github.com/balloonsys/UMO into develop

Conflicts:
	UMO/Service/BSURL.h