Add PURL to admin guide
Use Slug request header for resource location on create
Merge branch 'master' of github.com:3-Round-Stones/callimachus into develop

Conflicts:
	webapp/scripts/save-resource-as.js
	webapp/scripts/submit-turtle.js
Include slug header in submitEditor with local
Merge branch 'master' of github.com:3-Round-Stones/callimachus into develop
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