Use django-selectable==0.7.0
Clean up crm lookups code
Convert search view to CBV
Search -> QuickSearch

For more consistency and to differentiate it from the search utilities.
Change 'individual' -> 'user'

To match terminology used in the rest of the app.
Use POST data rather than GET data
Updated quick search tests
Check for null items when determining lookup value
Use POST in navigation quick search form
Render form on quick search template
Auto-submit upon selection for quick search
Fix failing tests

Was failing upon rendering the template.
Merge pull request #739 from caktus/search-updates

Quick search code cleanup and tests