Update CHANGELOG for 2.10.2 release

Update libE57Format to v2.0 release

Changelog updated (+ syntax fix)

CloudCompare 2.9 is ready (and ccViewer 1.37 as well)

Bug fix: multiple registration of the same overlay widget

Release date updated

Move Mac OS X release notes up to 2.7

The cross section box orientation can now be setup via the 'advanced'…

… button