leden: index on entities.studies.study

Signed-off-by: Bas Westerbaan <bas@westerbaan.name>
Add dt_cmp_{from,until}

Signed-off-by: Bas Westerbaan <bas@westerbaan.name>
Add Es.by_study

Signed-off-by: Bas Westerbaan <bas@westerbaan.name>
Add details for study entity

closes #32

Signed-off-by: Bas Westerbaan <bas@westerbaan.name>
Merge branch 'master' of https://github.com/karpenoktem/kninfra
entities: add index on person.dateOfBirth

Signed-off-by: Bas Westerbaan <bas@westerbaan.name>
entities: add by_year_of_birth

Signed-off-by: Bas Westerbaan <bas@westerbaan.name>
smoelen: revive bouwjaar

Signed-off-by: Bas Westerbaan <bas@westerbaan.name>
entities: add years_of_birth

Signed-off-by: Bas Westerbaan <bas@westerbaan.name>
smoelen: add years_of_birth page

Signed-off-by: Bas Westerbaan <bas@westerbaan.name>
Merge branch 'master' of https://github.com/karpenoktem/kninfra
entities_by_year_of_birth: "alle jaren" -> "geboortejaren"

Signed-off-by: Bas Westerbaan <bas@westerbaan.name>
Merge pull request #108 from khandhas-infra/study-detail

smoelen: pages for "studie" and "bouwjaar"