docs(incubation): change links and link tests for camunda-bpm-assert
docs(web UI): add docs about web UI tuning
chore(REST): add docs to get a historic process instance

related to CAM-1852
improve(migration guide): Improve JBoss guide
chore(reallife/examples): cleanup examples page
chore(examples): restructure page
fix(howtos): links to examples
chore(*): fix links to example repo
chore(examples): fix links
fix(enterprise): dead link
chore(bpmn-api): add section for BPMN model API access from delegate code

related to #CAM-1857
chore(bpmn-api): add section for access BPMN model using respository service

related to #CAM-1856
Merge pull request #21 from plexiti/camunda-bpm-assert

docs(incubation): change links and link texts for camunda-bpm-assert
docs(incubation): change incubation to community

This commit changes the wording from

incubation (space)

to

community (space/extensions)
fix(*): remove markdown markup inside html elements

Markdown markup cannot be used inside of html code blocks. Fixed
code, strong and a tags.

Also fix the filename of /img/real-life/retry.png to have a
lowercase filename extension.
fix(bpmn-model-api): clarify ingoing sequence flows in diagram
feat(bpmn-model): add bpmn model api to guides

add bpmn model api mentions to installation guides

related to CAM-1860
feat(userguide): document user operation logs

related to #CAM-1756
fix(supp-env): wording & formatting
chore(community): document community extensions

related to #CAM-1861