Includes id in investigator subject line

Supports parallel commit on databrary
Add app redirects for /register, /login, /search
Merge branch 'master' into staging
Fix bad characters in slug
Merge branch 'master' into staging
Pull slug from filename

Remove now-redundant (matching) slugs
Normalize post names for slugs
Rename files to match slugs

Verified no output change (aside from some posts, last commit)
Merge branch 'staging' into userguide

Conflicts:
	databrary/input/pages/about/jobs.md
	databrary/input/pages/about/jobs/front-end.md
	databrary/input/pages/user-guide.md
	databrary/input/pages/user-guide/access.md
	databrary/input/pages/user-guide/access/access.md
	databrary/input/pages/user-guide/contributing.md
	databrary/input/pages/user-guide/contributing/planning-for-data-sharing.md
	databrary/input/pages/user-guide/getting-authorized.md
	databrary/input/pages/user-guide/getting-authorized/agreement.md
	databrary/input/pages/user-guide/getting-authorized/getting-authorized.md
	databrary/input/pages/user-guide/getting-authorized/signing-agreement.md
	databrary/input/pages/user-guide/guidance/access.md
	databrary/input/pages/user-guide/guidance/contributing.md
	databrary/input/pages/user-guide/guidance/contributing/definitions.md
	databrary/input/pages/user-guide/guidance/contributing/organizing-your-data.md
	databrary/input/pages/user-guide/guidance/getting-authorized.md
	databrary/input/pages/user-guide/guidance/getting-authorized/managing-affiliates.md
	databrary/input/pages/user-guide/guidance/getting-authorized/signing-agreement.md
	databrary/input/pages/user-guide/guidance/proposal.md
	databrary/input/pages/user-guide/guidance/releasing-data.md
	databrary/input/pages/user-guide/guidance/releasing-data/adding-databrary-release.md
	databrary/input/pages/user-guide/guidance/releasing-data/common-questions.md
	databrary/input/pages/user-guide/guidance/releasing-data/grandfathering-data.md
	databrary/input/pages/user-guide/guidance/releasing-data/obtaining-participant-permissions.md
	databrary/input/pages/user-guide/guidance/releasing-data/release-levels.md
	databrary/input/pages/user-guide/guidance/releasing-data/release-script.md
	databrary/input/pages/user-guide/guidance/releasing-data/sample-intro-videos.md
	databrary/input/pages/user-guide/institutional-guidance.md
	databrary/input/pages/user-guide/institutional-resources.md
	databrary/input/pages/user-guide/institutional-resources/institution-resources.md
	databrary/input/pages/user-guide/releasing-data.md
	databrary/input/pages/user-guide/releasing-data/adding-databrary-release.md
	databrary/input/pages/user-guide/releasing-data/adding-release.md
	databrary/input/pages/user-guide/releasing-data/obtaining-participant-permissions/release-script-examples.md
	databrary/input/pages/user-guide/releasing-data/obtaining-participant-permissions/release-script.md
	databrary/input/pages/user-guide/releasing-data/release-script.md
	databrary/input/pages/user-guide/releasing-data/releasing-data.md
	databrary/input/pages/user-guide/releasing-data/sample-intro-videos.md