1.6.0 release is close

I'm about to release the 1.6.0 stable release in a few days. I've used the builder a lot, and did not found mayor problems (there are minor UI issues yet). As soon as the stable relese is created, a branch will be opened and work on the next mayor change will be started, which is pluggable template engines. This next mayor release will include velocity and jelly support. as plugins.