Fix RDE css/js resources to handle a prefix in the path. And fix the kiketable plugin css not being packaged for prod
use link_to helper to create popover links
use link_tag helpers for plugin assets
Add new config entries for frontend_prefix and public_prefix
Fix config prefix gsub
Modifications to make asset precompilation work with a URI prefix
Add readme for running under a prefix
New words for prefix readme
Use the public_prefix and frontend_prefix in the routes scope call
Allow selenium to check for javascript errors on the page

Remove foo() that was there for testing
WIP allow mutliple tokens to be selected via the linker widget
Allow for multiple linked_agents to be added via the linker (cloning all other fields for each linked_agent association record)
Only allow mutlitple subjets/agents to be added via the linker for new associations
Merge pull request #626 from hudmol/selenium-raise-javascript-errors

Make selenium raise an exception when a javascript error is detected on the page
Update linker label to reflect the multiplicity setting
Merge pull request #627 from hudmol/linker-with-multiple-items

[Delivers #51842627] Linker with multiple items
Update README_PREFIX.md
Merge pull request #625 from hudmol/path-with-prefix

[Delivers #62104836] Allow ArchivesSpace to run under a prefix e.g. http://example.com/aspace
Fix public tests - they now monitor javascript errors too
Add a new endpoint for fetching record tree_view structures