Refresh All performance. STS 2918. For Kris to review.
Comment change
comments and headers
potential defect fix
Merge branch 'alex-refresh-all'

Conflicts:
	org.springsource.ide.eclipse.gradle.core/src/org/springsource/ide/eclipse/gradle/core/TaskUtil.java
	org.springsource.ide.eclipse.gradle.core/src/org/springsource/ide/eclipse/gradle/core/actions/RefreshAllActionCore.java
	org.springsource.ide.eclipse.gradle.core/src/org/springsource/ide/eclipse/gradle/core/actions/ReimportOperation.java
	org.springsource.ide.eclipse.gradle.core/src/org/springsource/ide/eclipse/gradle/core/wizards/GradleImportOperation.java