Fix getRecordUrl docblock.
Print entire exception in "backtrace" area
Rework custom homepage routing.

Routes with query strings are now forced to work as redirects. The code
for working with the custom homepage is generally simplified also.
Fix strict-mode upgrade error on collections.
Fix #648, use correct variable for bare-link attrs
Added a call to parent search filters.
Optimized specific search filters.
Use internal assets by default.
Use Google fonts only if wanted.
Use original jQuery CDN instead of Google one.
Allows multiple derivative types.
Replaced unusual "case" condition by a "if".
Added a filter for full text indexation of elements.
Renamed "search_element_texts" the filter used for full text indexation.
Set default derivatives types automatically.
Allowed image tag for any record.