update gradle
add gradlew
update gradle
gradle define string resource applicationId
clean preference xml
control preference
rewrite app notification
format code
Merge branch '0.50' of git://github.com/qii/weiciyuan into 0.50

Conflicts:
	.idea/codeStyleSettings.xml
	build.gradle
	libs/crashlytics.jar
	libs/showcaseviewlibrary/build.gradle
	libs/showcaseviewlibrary/showcaseviewlibrary.iml
	libs/slidingmenulibrary/build.gradle
	libs/slidingmenulibrary/project.properties
	libs/slidingmenulibrary/slidingmenulibrary.iml
	libs/slidingmenulibrary/slidingmenulibrary1.iml
	src/org/qii/weiciyuan/support/utils/GlobalContext.java
	src/org/qii/weiciyuan/ui/main/LeftMenuFragment.java
	weiciyuan.iml