Adjusting filterCache and adding documentation

Signed-off-by: Benjamin Wiens <benjamin.wiens@gmail.com>
Adjusting QueryResultCache

Signed-off-by: Benjamin Wiens <benjamin.wiens@gmail.com>
Adjusting documentCache

Signed-off-by: Benjamin Wiens <benjamin.wiens@gmail.com>
Adjusted filterCache in website core.

Signed-off-by: Benjamin Wiens <benjamin.wiens@gmail.com>
Minor spacing improvement

Signed-off-by: Benjamin Wiens <benjamin.wiens@gmail.com>
Adjusted filterCache in reserves core.

Signed-off-by: Benjamin Wiens <benjamin.wiens@gmail.com>
Adjusted filterCache in authority core.

Signed-off-by: Benjamin Wiens <benjamin.wiens@gmail.com>
Adjusted filterCache in stats core.

Signed-off-by: Benjamin Wiens <benjamin.wiens@gmail.com>
Merge pull request #146 from vufind-org/solr_filtercache

Merging new solr configs