fixed readme dev enviroment nightly link
Merge pull request #43 from mxab/readme-fix-nightly

fixed readme dev enviroment nightly link
updated version to 3.6.1
Merge branch 'master' of
https://github.com/spring-projects/eclipse-integration-gradle

Conflicts:
	org.springsource.ide.eclipse.gradle.toolingapi/META-INF/MANIFEST.MF