Resolved #92: Increased default per_page to 50

Users requesting more results by default. Increased contact and note
search results to 50 items.
Resolved #91: Record count for search results

Added total number of records found in search results.
Resolve #87: Simplified due date search selection

Most of the time the sales people want the list of contacts who have the
due date set before today. Sometimes they want after today, mostly to
refer to the future list of contacts. Added a simple selection box to
the search form to select Anytime, Before today, or After today.

More complex due queries can be input directly:
due:[2013-01-01 TO 2014-01-01]