installation: Flask-Admin>=1.0.9

* Uses official released version of Flask-Admin>=1.0.9.  (closes #1797)

Signed-off-by: Jiri Kuncar <jiri.kuncar@cern.ch>
indexer: port of field tokenizer cache

Signed-off-by: Jiri Kuncar <jiri.kuncar@cern.ch>
search: initial query parser usage

* Adds new record matching API.

* Ports logging and fulltext terms extraction from query string.

* Fixes sorting and ranking with new search engine.

Signed-off-by: Jiri Kuncar <jiri.kuncar@cern.ch>
search: wip cleanup
sorter: port of data cachers

Signed-off-by: Jiri Kuncar <jiri.kuncar@cern.ch>