Legal tag search enhancements

Based on the search capability introduced in M23 (#74) and the original request (#36), the following enhancements are requested:

(1) Add sort, offset and limit capabilities.

Support for limit field (consistent with search service api)

   a. default to 10

   b. returns all results if limit = 0

   c. returns the "totalCount" field 

(2) Add wildcards support for generic text search and field text search.

(3) Apply 'between' search feature (currently only for 'expirationDate') to all fields to enable the range search for the date/time fields in the ExtensionProperties.

cc @hutchins @KellyZhou