add section on how to create Eclipse project

The first thing I looked for in Gradle user guide was "how can I import my new Java/Gradle project into Eclipse" ? This section: http://www.gradle.org/userguide/latest/userguide_single.html#sec:eclipse was not clear to me. I propose to add a very short section to Chapter 6. Java Quickstart to make things clear:

6.2.5. Creating Eclipse project
To import your project into Eclipse, simply run gradle eclipse. More on eclipse task can be found Chapter 15, The Java Plugin.

Patch included.

BTW. Is it possible to link (xhref linkend) to particular section in other document ? I guess that could be more useful if I could point exactly at "Chapter 15, Section 15.10. Eclipse" instead of "Chapter 15, The Java Plugin".