add example from branch 'develop-example'

See merge request !40

Develop usecase

See merge request !39

Update

Fix in Start() to work with sub_array_indices

Closes #38

See merge request !35

Update

Add name consistent check in AddStep when use_attributes is used

See merge request !38

Update

Fix syntax error from previous development

See merge request !37

update

Develop faqs

See merge request !34

Create usecase folder and usecase.md

See merge request !33

Develop transform

See merge request !32

Develop bugfixes issue23

See merge request !31

Merge branch 'develop-bugfixes-issue23' of https://earth.bsc.es/gitlab/es/startR into develop-bugfixes-issue23
bugfix

Develop bugfixes selectors

See merge request !29