3154 Preferences for building facets (functionality)

3154 Preferences for building facets (functionality)

Based on patch from Fridolyn Somers with input of Frederic Demians.
Added new Searching preference maxRecordsForFacets.
This pref contains number of result records used in facet building.
Also added pref displayFacetCount (with thanks to Frederic).
Follow up patch takes care of install issues; functionality can already be tested with this patch only.

Updated on March 17 for changes in include files.

Signed-off-by: Nicole C. Engard <nengard@bywatersolutions.com>
Signed-off-by: Chris Cormack <chrisc@catalyst.net.nz>