Merge branch 'master' into 'production'

See merge request !138

Develop version bump 2.1.0-4

See merge request !137

Develop merge split chunk reorder

See merge request !136

Test for DCPP HadGem3

See merge request !135

Develop faq howto11

See merge request !134

Develop time unit format

See merge request !129

Revise checks for return_vars names

See merge request !132

Stop if merge_across_dims and split_multiselected_dims are both used but this file dim selector is multi-dim array

Consider different dim order when finding the largest dim length

See merge request !131

Fix the time unit attribute retrieval if the format is YYYY-M-D. Also, split_multiselected_dims is changed to FALSE if it is useless.

Consider implicit inner dim in return_vars name check

See merge request !128

Split Start() into internal functions. Part I

See merge request !125

Fix the calendar retrieving line to consider synonims.

See merge request !127

Remove incorrect check of character selector.

See merge request !126