Pre-alpha release 61 (engine v0.54.5) - one last time!

This is another checkpoint release as the v1.0.0 milestone had about 50 completed items in it already. Might as well do a release to catch up with some nice module updates :-)

Tentative goal for v1.0.0 is the first weekend of the new year so we can take advantage of the holidays to get more work in.

More details in forum: http://forum.terasology.org/threads/pre-alpha-61-last-one-i-swear-d.1418/

Engine changes in Jenkins: http://jenkins.terasology.org/job/TerasologyStable/62