Admin flow fixes and bulk uploads

What's New:
- Admins can bulk-upload new employees from CSV
- Profile edit links reflect current user privileges

Bug Fixes:
- Initial signup logic
- Removed leftover logger debug code
- Fixed permission checks for regular users
New filtering capabilities and profile fields

What's New:
- Added location and title fields to the employee profile
- Added ability to filter employees by role or location
- New navbar
Merge branch 'ux_improvements_1'
Merge branch 'master' of https://github.com/polyfish42/PeopleDB into upstream-polyfish42

Conflicts:
	Gemfile
	app/views/employees/index.html.erb
	app/views/employees/show.html.erb
	app/views/layouts/application.html.erb
Refactored search

What's new:
- Added a search results page

Bug Fixes:
- Index page now shows more than the first 30 users
- Removed Solr stuff from Git
App text and search tweaks

What's New:
- Updated some links and titles for clarity
- Enabled synonym search for name variants like Matt/Matthew