Add FAQ entry about release dates (#602)

diff --git a/org.jacoco.doc/docroot/doc/faq.html b/org.jacoco.doc/docroot/doc/faq.html
index 8eb14e4..adfa66d 100644
--- a/org.jacoco.doc/docroot/doc/faq.html
+++ b/org.jacoco.doc/docroot/doc/faq.html
@@ -23,6 +23,20 @@
   before.
 </p>
 
+<h3>When will feature X be released?</h3>
+<p>
+  JaCoCo is maintained by volunteers in their free time. Since we cannot
+  guarantee free capacity, we do not commit to particular release dates.
+  Typically, you can expect a couple of releases every year.
+</p>
+<p>  
+  In the <a href="changes.html">change log</a>, you can see all features
+  that have been been implemented in master branch and will be available
+  with the next release. And in the meantime you can test latest build of
+  of master branch (<a href="repo.html">Maven SNAPSHOT</a>) and provide
+  <a href="support.html">feedback</a> to us.
+</p>
+
 <h3>Does JaCoCo have a plug-in for [Eclipse|Netbeans|Whatever...]?</h3>
 <p>
   See <a href="integrations.html">this list</a> for current integrations with