BibFormat: respect CFG_WEBSEARCH_FULLTEXT_SNIPPETS
BibFormat: respect CFG_WEBSEARCH_FULLTEXT_SNIPPETS

* The maximum number of snippets to show (CFG_WEBSEARCH_FULLTEXT_SNIPPETS)
  was not respected in some cases (when some snippets were shorter than
  allowed).  This patch fixes this problem.

* Removed two lines of dead code.

inveniosoftware/invenio-formatter,inveniosoftware/invenio-formatter,tiborsimko/invenio-formatter,tiborsimko/invenio-formatter,tiborsimko/invenio-formatter,inveniosoftware/invenio-formatter