Switched to storing requests based on UUID, generalized UUIDIndexReducer to work with any type of index

cleaned up remotedata for a better separation of concerns, moved statuscode and errormsg in to RemoteDataError object, moved pageInfo to PaginatedList object in the payload

Increase test coverage

Let linting exit with a nonzero status

Run Travis using headless Chrome addon

Configuration endpoints

# Conflicts:
#	src/app/core/core.module.ts

re-export RouterModule in AppRoutingModule

Filter facets and settings

Conflicts:
	src/app/+search-page/search-page.component.html
	src/app/+search-page/search-page.component.ts
	src/app/shared/shared.module.ts