update mata.yaml to mirror setup install, update version numbers

prepare 2.9.1 for release

update version numbers for release

Merge branch 'release-2.8.0'

add emit sensor (isofit#202)

Merge branch 'release-2.6.0'

Merge branch 'release-2.5.0'

Merge branch 'release-2.0.5'

Increment version number

Merge branch 'release-2.0.3'