Solve #118 by removing reference to Factory.
clarified that submap cutout is done using data coordinates.
Merge pull request #132 from Cadair/i118_factory

Solve #118 by removing reference to Factory.
Merge pull request #133 from aringlis/submap_index

Clarified that submap cutout is done using data coordinates (Listing 1).
Merge remote-tracking branch 'upstream/master' into schriste
small update