New SotBE bigmap and journey paths.

git-svn-id: http://svn.gna.org/svn/wesnoth/trunk@56518 75b3775d-3801-0410-9e12-e2e43121521d
Updated changelogs.

git-svn-id: http://svn.gna.org/svn/wesnoth/trunk@56519 75b3775d-3801-0410-9e12-e2e43121521d