STS-3960: make gradle classpath container refresh not block
other jobs while its fetching gradle model.
Merge pull request #67 from spring-projects/STS-3960

STS-3960: make gradle classpath container refresh not block
Merge branch 'master' into sts-tooling-model

Conflicts:
	org.springsource.ide.eclipse.gradle.core/src/org/springsource/ide/eclipse/gradle/core/classpathcontainer/GradleClassPathContainer.java