Fix rank calculation, skip # to increase rank

	modified:   trace/net.sf.milkfish.feature/feature.xml
	modified:   trace/net.sf.milkfish.systrace.core/META-INF/MANIFEST.MF
	modified:   trace/net.sf.milkfish.systrace.core/src/net/sf/milkfish/systrace/core/service/impl/SystraceService.java
Add description to function

	modified:   lib/net.sf.commonstringutil/src/net/sf/commonstringutil/StringUtil.java
	modified:   trace/net.sf.milkfish.systrace.core/src/net/sf/milkfish/systrace/core/event/impl/SystraceEvent.java
	modified:   trace/net.sf.milkfish.systrace.core/src/net/sf/milkfish/systrace/core/service/impl/SystraceService.java
Add sched_switch, sched_wakeup implementation

	modified:   trace/net.sf.milkfish.systrace.android.core/src/net/sf/milkfish/systrace/android/core/AndroidTrace.java
	new file:   trace/net.sf.milkfish.systrace.core/src/net/sf/milkfish/systrace/core/cache/TraceCache.java
	modified:   trace/net.sf.milkfish.systrace.core/src/net/sf/milkfish/systrace/core/cache/TraceLoader.java
	modified:   trace/net.sf.milkfish.systrace.core/src/net/sf/milkfish/systrace/core/service/ISystraceService.java
	modified:   trace/net.sf.milkfish.systrace.core/src/net/sf/milkfish/systrace/core/service/impl/SystraceService.java