Adds support for using formatting string and arguments to logging methods (java.lang.String.format-like usage)
Fixes #355
Add support for javadoc maven plugin #46

This commit adds maven-javadoc-plugin definition to our root pom.
With this, you can build javadoc using:
mvn install
mvn javadoc:javadoc
Implementing addAndRemoveProject() method in Server
Fixes #342
REDDEER-357: Fix FoldingPrefencePageTest
Fixed constructors in DefaultGroup (fixes #368)
Import project wizard dialog patch (fixes #336)
Widget lookup updated to allow better diagnostics