WebSearch: new fulltext by default search

 * Adds checkbox to search terms also in to fulltext to the add
   to search interface.

Signed-off-by: Patrick Glauner <patrick.oliver.glauner@cern.ch>
BibRank: Solr: better ranking for fulltext by default

 * Ranks fulltext and metadata properly

Signed-off-by: Patrick Glauner <patrick.oliver.glauner@cern.ch>
Solrutils: more accurate ranking scores

 * Ceils ranking scores to avoid anomalies

Signed-off-by: Patrick Glauner <patrick.oliver.glauner@cern.ch>
Merge pull request #30 from pglauner/master-fulltext-by-default

See last comment in <http://github.com/CERNDocumentServer/cds-ops/pull/30>
regarding kwargs.