Change PPA for geos etc. to fix Travis CI builds.
Merge pull request #23 from ajdawson/travis-geos-fix

Change PPA for geos etc. to fix Travis CI builds.
BF - handle dimension order and direction correctly.
Merge pull request #22 from ajdawson/iris-latitude-bug

BF - handle dimension order and direction correctly.
Added tests for reversed latitude dimensions.
Merge pull request #25 from ajdawson/reversed-lat-tests

Added tests for reversed latitude dimensions.
REL - Prepare for release of v1.2.1.
REL - Revert version number on maintenance branch.
Merge branch 'v1.2.x'

* v1.2.x:
  REL - Revert version number on maintenance branch.
  REL - Prepare for release of v1.2.1.
  Added tests for reversed latitude dimensions.
  BF - handle dimension order and direction correctly.
  Change PPA for geos etc. to fix Travis CI builds.