add pharo3.0 to lineup and readme
Merge branch 'pharo2.0' into pharo3.0
ensure ss3 version is in ancestry
ensure ss3 version is in ancestry
cherry-pick: fd9d9be3be16c5ea001c41d6ad93fa49de055dc3 (gitrepo work from Thierry)

Merge branch 'pharo2.0_dev' into pharo2.0

Conflicts:

	repository/MonticelloFileTree-Git.package/monticello.meta/version
Merging from gitfiletree before comitting the changes for pharo3.0
Updated for 3.0. Issue: not writing version/package metadata files.
ensureDirectory is deprecated, use ensureCreateDirectory
ensureDirectory is deprecated, use ensureCreateDirectory