chore(rest): update embeddability doc
Merge branch 'master' into develop
feat(introduced): add documentation entry to the navbar

this is the container entry for all documentation pages (javadoc etc.)
the guide partial for in the installation page is not yet working

related to CAM-457
feat(rest): document GET single process instance
fix(getting started): fix typo / add package note
Merge branch 'master' into develop

Conflicts:
	site/src/partials/navigation.html.eco
chore(nav): change nav structure
feat(download): add comment about license
Merge branch 'master' into develop
fix(docs): fix links and cleanup
fix(links): fix links to bpmn20 impl ref
fix more links
fix(layout): responsive header
fix(styles): fix brand positioning
fix(links): fix links to api-references
fix(navigation): adapt links
fix(analytics): fix callbacks
fix(navigation): fix broken home link
feat(download): Add 7.0.0-alpha2 to download

- add camunda-bpm-platform-7.0.0-alpha2 to download on tomcat, jboss and
  glassfish

related to CAM-401
fix(navigation): deactivate best practices link