In class/Microsoft.Build.Engine:

In class/Microsoft.Build.Engine:

	* Microsoft.Build.Engine_test.dll.sources: Replace BatchingImpl.cs with
	BatchingImplBase.cs, TargetBatchingImpl.cs and TaskBatchingImpl.cs

In class/Microsoft.Build.Engine/Microsoft.Build.BuildEngine:

	* BatchingImpl.cs: Split into ..
	* BatchingImplBase.cs: .. this,
	* TaskBatchingImpl.cs: .. this ..
	* TargetBatchingImpl.cs: .. and this. Implement target batching here.

	* Target.cs (DoBuild): Use TargetBatchingImpl for building.
	(Log*): Move to TargetBatchingImpl .
	(BuildTasks): New.
	(Engine): New.

In class/Microsoft.Build.Tasks/Test/Microsoft.Build.Tasks:

	* TaskBatchingTest.cs (*): Add tests for target/task events.
	(TestTargetBatching*): New tests for target batching.
	* TestMessageLogger.cs: Add counts for target/task started/finished
	events.
	(NormalMessageCount): New.

svn path=/trunk/mcs/; revision=125159