First cut of Orcid Integration is working
Make PermissionRegistry mutable, so other startup modules may add permissions.
Convert from HttpClient 3.1 to HttpClient 4.3
Merge branch 'maint-rel-1.6' into feature/orcid
Upgrade HttpClient libraries from 3.1 to 4.3.2
VIVO-769 Merge branch 'feature/orcid' into develop

Conflicts:
	webapp/src/edu/cornell/mannlib/vitro/webapp/controller/edit/PrimitiveRdfEdit.java
	webapp/src/edu/cornell/mannlib/vitro/webapp/controller/freemarker/FreemarkerHttpServlet.java